A mixture contains 0.250 mol of Fe and 1.20 g of C. What is the total number of atoms in the mixture?

Answers

Answer 1

The total number of atoms in the mixture containing 0.250 mol of Fe and 1.20 g of C is calculated to be 1.59 x 10^23 atoms.

To determine the number of atoms in the mixture, we follow these steps:

1. Calculate the number of moles of carbon (C) by dividing its mass by its molecular weight. The atomic weight of carbon is 12.011 g/mol, so its molecular weight is also 12.011 g/mol. Therefore, moles of C = 1.20 g / 12.011 g/mol = 0.0999 mol.

2. Use Avogadro's number (6.022 x 10^23 atoms/mol) to convert the number of moles of carbon into the number of atoms. Number of atoms of C = 0.0999 mol x 6.022 x 10^23 atoms/mol = 6.015 x 10^22 atoms.

3. Calculate the number of atoms of iron (Fe) by multiplying the number of moles of Fe (0.250 mol) by Avogadro's number. Number of atoms of Fe = 0.250 mol x 6.022 x 10^23 atoms/mol = 1.505 x 10^23 atoms.

4. Finally, determine the total number of atoms in the mixture by adding the number of atoms of C and Fe. Total number of atoms = 6.015 x 10^22 atoms + 1.505 x 10^23 atoms = 1.59 x 10^23 atoms.

Based on the calculations, the mixture containing 0.250 mol of Fe and 1.20 g of C consists of a total of 1.59 x 10^23 atoms. This value represents the combined number of atoms of carbon and iron present in the mixture.

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Related Questions

6. A diamond contains 5.0 ×10^21 atoms of carbon. What amount(moles) of carbon and what mass (grams) of carbon are in this diamond? *
a. 0.008303 and 0.0997
b. 0.008303g and 0.0997mol
c. 0.008303amu and 0.0997
d. 0.008303 and 0.0997amu

Answers

Answer:

0.008303 mol and 0.0997 g

Explanation:

From Avogadro's hypothesis, we understood that 1 mole of any substance contains 6.022×10²³ atoms.

This implies that 1 mole of carbon also contains 6.022×10²³ atoms.

Next, we shall determine the mole of carbon that contains 5.0×10²¹ atoms. This can be obtained as follow:

1 mole of carbon contains 6.022×10²³ atoms.

Therefore, Xmol of carbon will contain 5.0×10²¹ atoms i.e

Xmol of carbon = 5.0×10²¹ / 6.022×10²³

Xmol of carbon = 0.008303 mole

Therefore, 0.008303 mole of carbon contains 5.0×10²¹ atoms.

Finally, we shall determine the mass of carbon. This can be obtained as follow:

Mole of carbon = 0.008303 mole

Molar mass of carbon = 12.01 g/mol

Mass of Carbon =.?

Mole = mass /Molar mass

0.008303 = mass of carbon/12.01

Cross multiply

Mass of Carbon = 0.008303 x 12.01

Mass of Carbon = 0.0997 g.

what happens to the entropy of the system as the reaction progresses in the forward direction

Answers

As the reaction progresses in the forward direction, the entropy of the system typically increases. This is because the products of the reaction are often more disordered or have higher degrees of freedom than the reactants, which leads to an overall increase in entropy.

However, there may be cases where the opposite is true and the entropy decreases as the reaction progresses. It ultimately depends on the specific reaction and conditions involved.

1. If the reaction leads to an increase in the number of molecules or a more disordered state, the entropy of the system will increase. This typically occurs when a solid or liquid reactant is converted into gaseous products or when the number of moles of gaseous products is greater than the moles of gaseous reactants.

2. If the reaction results in a decrease in the number of molecules or a more ordered state, the entropy of the system will decrease. This is commonly seen in reactions where gaseous reactants form solid or liquid products, or when the number of moles of gaseous products is less than the moles of gaseous reactants.

3. If the reaction does not change the number of molecules or the level of disorder, the entropy of the system will remain constant.

The entropy of the system can increase, decrease, or stay constant as the reaction progresses in the forward direction, depending on the changes in the number of molecules and the disorder in the system.

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what is the molarity of sodium carbonate in 327.2 ml solution that contains 0.02678 kg of sodium ion? (assume: mass of sodium ion

Answers

To find the molarity of sodium carbonate in the given solution, we first need to calculate the number of moles of sodium ion present in the solution.

The mass of sodium ion present in the solution is 0.02678 kg.

We know that the molar mass of sodium ion is 22.99 g/mol (approximately).

Therefore, the number of moles of sodium ion present in the solution is:

moles of sodium ion = (0.02678 kg) / (22.99 g/mol)
moles of sodium ion = 1.164 mol

Now, we need to determine the number of moles of sodium carbonate that would be required to provide 1.164 moles of sodium ion.

The formula for sodium carbonate is Na2CO3, which means that each molecule of sodium carbonate contains two sodium ions.

So, the number of moles of sodium carbonate required to provide 1.164 moles of sodium ion is:

moles of sodium carbonate = (1.164 mol) / 2
moles of sodium carbonate = 0.582 mol

Finally, we can calculate the molarity of sodium carbonate in the given solution.

Molarity = moles of solute / liters of solution

We are given that the volume of the solution is 327.2 ml, which is equivalent to 0.3272 liters.

Therefore, the molarity of sodium carbonate in the solution is:

Molarity = 0.582 mol / 0.3272 L
Molarity = 1.778 M

So, the molarity of sodium carbonate in the given solution is 1.778 M.

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Classify each property as physical or chemical.
a) the explosiveness of hydrogen gas
b) the bronze color or copper
c) the shiny appearance of silver
d) the ability of dry ice to sublime (change from solid directly to vapor)

Answers

a) The explosiveness of hydrogen gas is a chemical property.

b) The bronze color of copper is a physical property.

c) The shiny appearance of silver is a physical property.

d) The ability of dry ice to sublime (change from solid directly to vapor) is a physical property.

Chemical properties are properties that describe the behavior of a substance during a chemical reaction or a chemical change. Explosiveness of hydrogen gas is an example of a chemical property because it describes how hydrogen gas reacts with oxygen to form water and how the reaction releases a large amount of energy in the form of an explosion.

Physical properties, on the other hand, are properties that describe the characteristics of a substance that can be observed or measured without changing the composition of the substance. Examples of physical properties include the color, texture, and melting point of a substance. The bronze color of copper and the shiny appearance of silver are both examples of physical properties.

The ability of dry ice to sublime (change from solid directly to vapor) is also a physical property because it describes a physical change that occurs when dry ice is heated or exposed to high pressure.

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32.30 mL of 0.220 M H2SO4(aq) are titrated with 46.30 ml of a NaOH solution. What is the molarity of the NaOH(aq)? Show your work. 32,3004,220m) = (46.30 mL/CM). 46-30 m 46.30 mL

Answers

The molarity of the NaOH(aq) solution is 0.156 M.

The balanced equation for the reaction between sulfuric acid and sodium hydroxide is H₂SO₄(aq) + 2NaOH(aq) → Na₂SO₄(aq) + 2H₂O(l). From the balanced equation, it can be deduced that the mole ratio of NaOH to H₂SO₄ is 2:1. Hence, the moles of H₂SO₄ reacted = Molarity of H₂SO₄ × Volume of H₂SO₄ used in liters = 0.220 M × 0.03230 L = 0.007106 moles.

Using mole ratio, the moles of NaOH reacted = 2 × 0.007106 = 0.01421 moles. Molarity of NaOH = Moles of NaOH / Volume of NaOH used in liters= 0.01421 moles / 0.04630 L = 0.306 M or 0.156 M (rounded off to three significant figures). Thus, the molarity of the NaOH(aq) is 0.156 M.

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What is the phase of water at 1.0 atm and 50°C?
Water
(liquid)
Pressure (atm)
1 -
0.5
0.25-
Ice
(solid)
Water vapor
(gas)
0
Oy
Temperature (*C)
O A. Liquid and gas
O B. Liquid
O C. Solid
O D. Gas

Answers

there is a change from vapour to liquid

a buffer that contains 0.49 m of a base, b and 0.45 m of its conjugate acid bh , has a ph of 8.87. what is the ph after 0.024 mol of ba(oh)2 are added to 0.62 l of the solution?

Answers

The pH of the buffer solution after 0.024 mol of Ba(OH)₂ are added is approximately 4.90.

To solve this problem, we need to use the Henderson-Hasselbalch equation, which relates the pH of a buffer solution to the concentrations of the weak acid and its conjugate base;

pH = pKa + log([base]/[acid])

where pKa will be the dissociation constant of the weak acid, [base] is the concentration of the conjugate base, as well as [acid] is the concentration of the weak acid.

From the given information, we can determine the pKa of the weak acid;

pH = 8.87 = pKa + log([base]/[acid])

pKa = 8.87 - log([base]/[acid])

pKa = 4.83

We can also determine the initial concentrations of the weak acid and its conjugate base.

[base] = 0.49 M

[acid] = 0.45 M

Now, we can use the balanced chemical equation for the reaction of Ba(OH)₂ with BH;

Ba(OH)₂ + 2BH → BaB₂ + 2H₂O

The moles of BH that react with the added Ba(OH)₂ is equal to half the moles of Ba(OH)₂ added, because the stoichiometry of the reaction is 2:1. Therefore, moles of BH consumed = 0.024 mol / 2 = 0.012 mol

The volume of the solution is given as 0.62 L, so the new concentration of BH is;

[acid] = (0.45 M x 0.62 L - 0.012 mol) / 0.62 L

[acid] = 0.441 M

The new concentration of B can be determined from the conservation of mass equation:

[base] + [BaB2] = constant

[base] + 0.012 mol / 0.62 L = constant

[base] = 0.49 M - 0.012 mol / 0.62 L

[base] = 0.470 M

Now, we can use the Henderson-Hasselbalch equation to determine the new pH of the buffer solution

pH = pKa + log([base]/[acid])

pH = 4.83 + log(0.470/0.441)

pH = 4.90

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Which is not a rule for naming binary molecular compounds. Multiple choice question. The first element in the formula is always named first, using the entire element name. The second element in the formula is named using its root and adding the suffix -ide. Identify the oxyanion present and adjust the suffix of this anion to either -ic or -ous. Prefixes are used to indicate the number of atoms of each element that are present in the compound.

Answers

The rule for naming binary molecular compounds that is not true is, "Prefixes are used to indicate the number of atoms of each element that are present in the compound."

Explanation:Binary molecular compounds are formed when two nonmetals combine chemically. For example, HCl, CO2, H2O, etc. The rule for naming binary molecular compounds are: The first element in the formula is always named first, using the entire element name.The second element in the formula is named using its root and adding the suffix -ide.The prefixes are used to indicate the number of atoms of each element that are present in the compound only if there are two or more atoms of the first element, otherwise, prefix mono- is not used. The prefix rules are same as used in writing covalent compounds.Here are some examples of binary molecular compounds naming rules:

CO2 = carbon dioxideSO3 = sulfur trioxide SO2 = sulfur dioxide H2O = dihydrogen monoxide CBr4 = carbon tetrabromideI2O5 = diiodine pentoxide NO2 = nitrogen dioxideN2O = dinitrogen monoxide

In summary, "Prefixes are used to indicate the number of atoms of each element that are present in the compound" is not a rule for naming binary molecular compounds.

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Use standard enthalpies of formation to calculate the standard enthalpy of reaction for the following reaction:
2 H2S(g) + 3 O2(g) → 2 H2O(l) + 2 SO2(g) ΔH∘rxn

Answers

The standard enthalpy of the reaction for the given equation is -863.2 kJ/mol.

The standard enthalpy of the reaction can be calculated by subtracting the sum of the standard enthalpies of the formation of the reactants from the sum of the standard enthalpies of the formation of the products:

ΔH∘rxn = ΣnΔH∘f(products) - ΣmΔH∘f(reactants)

where n and m are the coefficients in the balanced chemical equation, and ΔH∘f is the standard enthalpy of formation.

The standard enthalpy of formation for H2S(g), H2O(l), and SO2(g) can be found in tables as follows:

ΔH∘f(H2S(g)) = -20.2 kJ/mol

ΔH∘f(H2O(l)) = -285.8 kJ/mol

ΔH∘f(SO2(g)) = -296.8 kJ/mol

O2(g) is an elemental form and has a standard enthalpy of formation of 0 kJ/mol.

Using these values and the balanced chemical equation, we can calculate the standard enthalpy of the reaction:

ΔH∘rxn = [2(-285.8 kJ/mol) + 2(-296.8 kJ/mol)] - [2(-20.2 kJ/mol) + 3(0 kJ/mol)]

= -863.2 kJ/mol

Therefore, the standard enthalpy of the reaction for the given equation is -863.2 kJ/mol.

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bserve: two families of chemicals are acids and bases. acids and bases can be detected by an indicator, which is a substance that changes color in the presence of an acid or a base. phenol red is an indicator that is yellow in an acid, orange in a neutral solution, and pink in a base. click reset. drag the phenol red next to the flask of water. what does the indicator show? click play, and wait for the reaction to end. what does the indicator show now?

Answers

1. It shows that the acid is like a solid chemical that shows acid and base. So that the solution created is neutral. If acid would have not shown then the solution would have been basic.

2. The water was displaced out of the test tube because gas bubbles were being produced and without displacement of water the production of bubbles is not possible.

When mixed acids and bases neutralize each other to form salts, substances with a salty taste do not have the characteristics of acids or bases. Phenolphthalein is used as an indicator in acid-base titration. It is colorless in acidic solutions and pink in basic solutions.

Litmus is one of the most commonly used natural indicators for distinguishing between acids and bases in the laboratory. Litmus is a naturally occurring indicator. Litmus solution is a purple dye obtained from lichen a plant of the taro plant family. Litmus turns purple when mixed with a neutral solution.

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1. Describe what happens to water particles as you increase/decrease the temperature/pressure? (hint: movement/speed, attraction, density, volume, state of matter)
2. Describe and explain what happens to balloons when they are heated/cooled
3. Describe what happens to a cold beverage container on a hot day?
4. Explain how a glass (mercury) thermometer works.

Answers

1) The speed of the particles would increase when heated

2) The balloon would expand when heated and contract when cooled.

3) On a hot day, the pressure of the gas in a beverage increases

4) The mercury thermometer works by expanding or contracting in response to temperature change.

What is effect of temperature?

We know that one of the effects of temperature is that it is able change the molecular motion of an object. Thus the molecules of an object are able to move faster when heat is applied and they are able to slow down when the heat is removed.

This is why a balloon would have a greater volume when the temperature is increased as the gas molecules spread out. The volume would reduce or decrease when the temperature is reduced.

Also, on a hot day, a beverage would tend to be more fuzzy as the pressure of the gas in the beverage would increase as the temperature is increased.

Lastly, when we use the mercury thermometer, the volume of the mercury would increase and this is the reason for the expansion of the mercury during temperature measurement.

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What are the two types of microscopes?
+

Answers

Answer:

1) The light microscope. The common light microscope used in the laboratory is called a compound microscope because it contains two types of lenses that function to magnify an object. The lens closest to the eye is called the ocular, while the lens closest to the object is called the objective. Most microscopes have on their base an apparatus called a condenser, which condenses light rays to a strong beam.

2) Other light microscopes. In addition to the familiar compound microscope, microbiologists use other types of microscopes for specific purposes. These microscopes permit viewing of objects not otherwise seen with the light microscope.

3) The fluorescent microscope uses ultraviolet light as its light source. When ultraviolet light hits an object, it excites the electrons of the object, and they give off light in various shades of color. Since ultraviolet light is used, the resolution of the object increases. A laboratory technique called the fluorescent‐antibody technique employs fluorescent dyes and antibodies to help identify unknown bacteria.

Identify the reagent (and its concentration) that is used to confirm the presence of each of the following: NH4+, Cu2+, Ca2+

Answers

6 M NaOH, Cocn.NH3, ammonium oxalate are the reagents (and its concentration) that is used to confirm the presence of each of the following: NH4+, Cu2+, Ca2+

1. The first confirmation test: Add 10 drops of 6 M NH3 to half of the supernatant you recovered from section C.

To verify that NH4+ is present

Add 10 drops of 3M NaOH slowly, drop by drop, to the centrifuge test tube after adding 5 drops of the Group I solution, being careful to prevent any solution from reaching the test-mouth. tube's

Put a damp piece of pH indicator paper on the tube's top. The tubing is warmed by boiling water. The presence of NH4+ is confirmed if the universal indicator paper becomes blue or blue green.

To verify the existence of Cu2+

Dilute 0.2g of the sample in hot concentrated HCl, then add NH3 OH solution to produce the solution ammoniacal. Dilution of acetic acid with a few drops of ferrocyanide will acidify The presence of Cu2+ is established if a chocolate brown ppt is produced.

In order to verify the existence of Ca+

Ammonium oxalate solution should be reacted with 2 ml of the sample solution. White ppt reveals the presence of Ca+.

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what type of diagram is this? is it a proteins or lipid diagram?

what type of diagram is this? is it a proteins or lipid diagram?

Answers

This is a lipid diagram.

✒ Answer

what type of diagram is this?

Answer: A lipid diagram

is it a proteins or lipid diagram?

Answer: A lipid diagram

#together we go far

what type of diagram is this? is it a proteins or lipid diagram?

a car is traveling 35 miles/hr for 17 miles. How much time has the car been on the road?

a
595 hours
b
2.1 hours
c
1.5 hours
d
0.49 hours

Answers

Answer:

The car has been on the road for 0.49 hours

Explanation:

A car is traveling 35 miles/hr for 17 miles.

Speed of a car = 35 miles/hr

Distance travelled = 17 miles

The relationship between speed, distance, and time is given by

Distance = Speed × Time

Put Speed = 35 miles/hr, Distance = 17 miles

\(17=35\) × Time

Time = \(\frac{17}{35}=0.49\) hours

So, the car has been on the road for 0.49 hours

The time car has been on the road has been 0.49 hours. Thus, option D is correct.

Speed can be defined as the distance traveled by the object in unit time. The speed can be expressed as:

\(\rm Speed\;=\;\dfrac{Distance}{Time}\)

The car has been given to be traveling at:

Speed = 35 miles/hr

Distance traveled = 17 miles.

The time taken by car to travel 17 miles can be calculated by substituting the values as:

\(\rm 35\;miles/hr\;=\;\dfrac{17\;miles}{Time}\\\\\\\\Time\;=\;\dfrac{17\;miles}{35\;miles/hr}\)

Time = 0.49 hr.

The time taken by car to travel 17 miles has been 0.49 hours. Thus, the correct option has been D.

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C is produced as a result of combustion of organic matter with insufficient oxygen. a. Methane WA MTU M b. Benzene TO Ci Carbon dioxide Od. Carbon monoxide Oe. Mercury Om du

Answers

The correct answer is Carbon Monoxide (CO). When organic matter is burned with insufficient oxygen, it leads to incomplete combustion and the production of various gases, including carbon monoxide. Carbon monoxide is a colorless, odorless gas that is extremely poisonous and can be fatal in high concentrations.Carbon dioxide (CO2) is a product of complete combustion and is not produced when there is insufficient oxygen.Benzene is a hydrocarbon compound composed of six carbon atoms and six hydrogen atoms, and it is not produced from combustion.Methane (CH4) is a hydrocarbon compound composed of one carbon atom and four hydrogen atoms, and it is not produced from combustion.Mercury is a metallic element and is not related to combustion.

Two students are planning an investigation to determine if ionic or covalent bonds have stronger intermolecular forces. They are using salt (ionic), sugar (polar covalent), and moth balls (nonpolar covalent). Which property below would be the LEAST helpful in determining what bond type has the strongest intermolecular forces?



Flammability


Solubility in water


Conductivity in water


Melting Point

Answers

Answer:

conductivity in solid state/ in water

Explanation:

conducitvity in water state would be least helpful when trying to determine the bond type that has the strongest intermolecule force, becuase they (salt and water) both would dissolve in water the same.

The property that will be least helpful in the determination of the bond type that has the strongest intermolecular forces is C. Conductivity in water.

It should be noted that the students wanted to investigate whether ionic or covalent bonds have stronger intermolecular forces.

In order to carry out the investigation, salt, sugar, and molar balls are used. Based on this, the property that is required for the investigation will be flammability, solubility in water, and the melting point.

The conductivity in water isn't required.

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How many grams of CH4 is needed to produce 44.2 g CHCl3?

Answers

The amount, in grams, of \(CH_4\) needed to produce 44.2 g of \(CHCl_3\) would be 5.93 grams.

Stoichiometric problem

Chloroform, \(CHCl_3\), is formed from the reaction of methane with chlorine according to the following chemical equation:

\(CH_4+3Cl_2 --- > CH_3Cl +3HCl\)

From the equation, the mole ratio of methane to chloroform is 1:1.

Given 44.2 g of \(CHCl_3\), the equivalent mole would be:

Mole = mass/molar mass = 44.2/119.38 = 0.37 moles

From the mole ratio established from the balanced equation of the reaction, the equivalent mole of methane, \(CH_4\), needed will also be 0.37 moles.

Now, let's convert the mole to mass.

Mass = mole x molar mass

The molar mass of methane is 16.04 g/mol

Mass of 0.37 moles of methane = 0.37 x 16.04 = 5.93 grams

In other words, the amount of methane needed to produce 44.2 grams of chloroform would be 5.93 grams.

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Use the solubility curve to match each scenario with its correct saturation level. All scenarios are in 100g of water.

Use the solubility curve to match each scenario with its correct saturation level. All scenarios are

Answers

The curve represents saturation. Below the curve, the water is unsaturated. Above the curve, water is supersaturated. This means that more solute is present than the water can contain.

The line of the solubility curve indicates that the solution is saturated. A saturated solution is defined as a solution in which 100 g of solute is dissolved in 100 g of water. Simulations below this line indicate unsaturated solutions.

The difference between unsaturated and saturated solutes can be determined by adding very small amounts of solute to the solution. In unsaturated solutes, solutes will dissolve, and solutes in saturated solutes will not dissolve. In saturated solutes, crystals will form very quickly around the added solute.

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What is the universal solvent?
A. hydrogen
B. water
C. oil
D. acid​

Answers

Answer:

water

Explanation:

because it's capable of dissolving more substances

Answer:

B. water  It can dissolve more substances

Explanation:

Select the choice that best describes the relationship of the following pair of compounds. O constitutional isomers O geometric isomers O the same compound O not isomeric

Answers

The choice that best describes the relationship of the following pair of compounds is constitutional isomers. Option A is correct. Constitutional isomers are a type of structural isomers that have the same molecular formula but differ in their connectivity.

They differ in the order of attachment of atoms, bond breaking and forming, and arrangement of atoms. Constitutional isomers have different chemical and physical properties such as boiling and melting points, density, and solubility. To illustrate, an example of constitutional isomerism is butane and 2-methylpropane (isobutane). These two compounds have the same chemical formula, C4H10, but differ in their structural formula and bonding arrangement.

Butane is a linear molecule with four carbon atoms and ten hydrogen atoms, while isobutane has a branched structure with three carbon atoms and one methyl group (-CH3) attached to the central carbon. They have different properties such as boiling point, density, and melting point. In summary, the relationship between the two compounds is constitutional isomers. Option A is correct.

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Which items can be classified as matter? Check all that apply.

Answers

Answer:

a globe

snow rain clouds

Determine the limiting reactant and how much of that limiting reactant you would need in order to use up all of the non-limiting reactant.
Assume you have 25 grams of glucose and 40 grams of oxygen as reactants for the following photosynthesis reaction:
C6​H12​O6​ O + 6O2​ --> 6CO2​ + 6H2​O + Energy

A
Glucose is the limiting reactant; You would need .1388 moles of glucose to use up all of the Oxygen
B
Glucose is the limiting reactant; You would need .208 moles of glucose to use up all of the Oxygen
C
Oxygen is the limiting reactant; You would need 1.25 moles of Oxygen to use up all of the glucose
D
Oxygen is the limiting reactant; You would need .8328 moles of Oxygen to use up all of the glucose

Answers

B. Glucose is the limiting reactant you would need .207 moles of glucose

15POINTS

What is acceleration? O A. A change in speed B. A change in speed or direction O C. A change in force O D. A change in force or energy​

Answers

A

acceleration is change in speed

Answer:

A. Change in speed

Most body water intake is from __________, whereas most body water lost is via __________.

Answers

Most body water intake is from drinking, whereas most body water lost is via ; urine.

Where is most of the water of the body found ?

Most body water is found within the extracellular fluid. the 2 major forces that result in the movement of water are fluid pressure and osmotic pressure. In ECF , the main cation is potassium, and therefore the major anions are chloride and bicarbonate.

How does water get distributed within the body?

The water we drink is absorbed by the intestines, and circulated throughout the body within the form of body fluids such as blood. These perform various functions that keep us alive. They deliver oxygen and nutrients to the cells, and remove waste materials, which are then eliminated with urination.

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Give one example of each of the following, that happens to us in our everyday life: Explain a bit about the science behind it, so for example, for melting you can say ice cream melting in your hand, which turns from a solid to a liquid, which is melting. If you are unsure please do not answer, though if you are confident please be free to do so! Have a wonderful day or night!
a) Melting:
b) Freezing:
c) Condensation:
d) Evaporation:
e) Sublimation.

Answers

a) Melting: An example of melting that occurs in our everyday life is when we heat butter on a stovetop.

b) Freezing: Freezing is the process in which a liquid transforms into a solid upon cooling.

c) Condensation: One example of condensation that we encounter regularly is when water droplets form on the surface of a cold drink on a hot day.

d) Evaporation: Evaporation is the process by which a liquid transforms into a gas or vapor.

e) Sublimation: Sublimation refers to the transformation of a substance directly from a solid to a gas without passing through the liquid state.

a) Melting:  Butter is a solid at room temperature, but when heat is applied, it melts into a liquid. This change is a result of the increase in temperature, which provides enough energy to overcome the intermolecular forces holding the butter molecules together.

b) Freezing:Eventually, the temperature reaches the freezing point of water (0°C or 32°F), at which the water molecules slow down and arrange themselves into a regular, crystalline structure. This transformation from a liquid to a solid state is accompanied by the release of heat energy.

c) Condensation: As the temperature decreases, the air's capacity to hold moisture decreases, causing the water vapor in the air to condense into liquid water droplets. This process occurs due to the transfer of heat energy from the warm air to the cold surface, leading to the saturation of the air and the conversion of water vapor into liquid form.

d) Evaporation:  As the sun's heat energy is absorbed by the water molecules on the clothes' surface, their kinetic energy increases, causing them to break free from the liquid phase and escape into the surrounding air as water vapor. This process occurs because the molecules at the liquid surface with sufficient energy can overcome the attractive forces within the liquid and enter the gas phase.

e) Sublimation: Sublimation refers to the transformation of a substance directly from a solid to a gas without passing through the liquid state. An example of sublimation is the process of dry ice (solid carbon dioxide) converting into carbon dioxide gas.

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order the units from smallest to largest.
a. centigram
b. microgram
c. kilogram
d. milligram
e. megagram
f. nanogram

Answers

Answer:

f. nanogram

b. microgram

d. milligram

a. centigram

c. kilogram

e. megagram

Explanation:

f. nanogram = 10^-9

b. microgram = 10^-6

d. milligram = 10^-3

a. centigram = 10^-2

c. kilogram = 10^3

e. megagram = 10^6

The order of the units from smallest to largest.

f. nanogram

b. microgram

d. milligram

a. centigram

c. kilogram

What are SI units?

SI units are those units that are used to measure different measurements. The SI units mean the Internation system of measurement.

A nanogram is the smallest unit of measurement. It is used to measure a very minuter amount of an object. Its value is 10⁻⁹. After this, there is a microgram, which is sued to measure micro things. Its value is 10⁻₆

Milligram, then centigram, and then there is the kilogram. The kilogram is the largest unit of measurement in the SI unit. These units are used to measure the mass of a substance.

Thus, the correct order is

f. nanogram

b. microgram

d. milligram

a. centigram

c. kilogram

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Which of the following is NOT a branch of chemistry? *
Analytical Chemistry
Organic Chemistry
Physical Chemistry
Mechanical Chemistry

Answers

Mechanical because the 11 branches of chemistry are , Analytical chemistry, Biochemistry, Electrochemistry, Environmental,  Inorganic chemistry, Organic chemistry, Physical Chemistry, Polymer chemistry Thermochemistry, Theoretical chemistry, and Lastly Chemistry.

Mechanical Chemistry is not a branch of chemistry.

Traditionally, chemistry has been broken into five main subdisciplines: Organic, Analytical, Physical, Inorganic and Biochemistry.

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how many moles of fe2 o3 are formed when 16.7 g of fe reacts completely with oxygen is available?

Answers

0.1495 moles of Fe2O3 are formed when 16.7 g of Fe reacts completely with oxygen. The calculation is based on the balanced chemical equation.

The substance condition for the response among Fe and O2 is:

4Fe + 3O2 → 2Fe2O3

This condition lets us know that 4 moles of Fe respond with 3 moles of O2 to create 2 moles of Fe2O3. In this manner, the mole proportion of Fe to Fe2O3 is 4:2 or 2:1.

To work out the quantity of moles of Fe2O3 framed when 16.7 g of Fe responds totally with oxygen, we first need to change the given mass of Fe over completely to moles utilizing its molar mass:

molar mass of Fe = 55.845 g/mol

moles of Fe = 16.7 g/55.845 g/mol = 0.299 mol

Since the mole proportion of Fe to Fe2O3 is 2:1, the quantity of moles of Fe2O3 framed is a portion of the quantity of moles of Fe that responded:

moles of Fe2O3 = 0.299 mol/2 = 0.1495 mol

In this way, 0.1495 moles of Fe2O3 are framed when 16.7 g of Fe responds totally with oxygen. This computation shows that stoichiometry, the connection between the amounts of reactants and items in a substance response, is significant in deciding how much item framed.

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The car has a rechargeable battery to drive it’s motor. The rechargeable battery provided a potential difference of 330 volts and can store up to 64 mega Jules it takes 8 hours for the battery to receive a full charge assume that the charging process is 100% efficient calculate the total charge the flows while the battery is being charged

Answers

The total charge that flows while the battery is being charged is approximately 193,939.39 Coulombs.

To calculate the total charge that flows while the battery is being charged, we can use the relationship between electrical energy, potential difference, and charge.

The electrical energy (E) stored in the battery is given as 64 mega Jules (64 MJ). The potential difference (V) provided by the battery is 330 volts. We know that the energy (E) is equal to the product of the potential difference (V) and the charge (Q):

E = V * Q

Since the charging process is 100% efficient, all the electrical energy supplied is stored in the battery. Therefore, we can rearrange the equation to solve for the charge (Q):

Q = E / V

Substituting the given values, we have:

Q = 64 MJ / 330 V

To perform the calculation, we need to convert mega Jules (MJ) to joules (J) since the SI unit of energy is joules. One mega Joule is equal to 1 million joules:

Q = (64 * 10^6 J) / 330 V

Calculating the division:

Q ≈ 193,939.39 Coulombs

Therefore, the total charge that flows while the battery is being charged is approximately 193,939.39 Coulombs.

This value represents the quantity of electric charge transferred during the charging process, and it indicates the amount of electricity that enters the battery.

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