What is the molecular formula of a compound that has a molecular weight of 240. 0 grams?. A 5. 00-gram sample contains 2. 00 grams of carbon, 0. 34 grams of hydrogen, and 2. 69 grams of oxygen

Answer:did h find the answer

Explanation:

Tubes Amount of Hydrogen Amount Tubes Peroxide of Catalase 1. 4cm 1cm 2. 4cm 2cm 3. 4cm 3cm: Tube 3 would show the most activity given unlimited time.

What is the catalase concentration experiment?

Catalase concentration experiment is an experiment that involves hydrogen peroxide, catalase, and a small amount of water in three tubes. The tubes contain hydrogen peroxide and catalase, with different amounts of hydrogen peroxide added. Catalase is an enzyme that breaks down hydrogen peroxide into water and oxygen gas.

The enzyme catalase can be used to investigate the effect of enzyme concentration on the speed of the reaction. As the concentration of the enzyme increases, so does the rate of the reaction.

Which tube would show the most activity given unlimited time?

Tube 3 would show the most activity given unlimited time in the catalase concentration experiment. Tube 3 contains 4 cm of hydrogen peroxide and 3 cm of catalase. As the concentration of the enzyme increases, the rate of the reaction also increases.

Tube 1 contains 4 cm of hydrogen peroxide and 1 cm of catalase, while tube 2 contains 4 cm of hydrogen peroxide and 2 cm of catalase. Therefore, Tube 3 would show the most activity given unlimited time.

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The specific humidity of the air is 0.0085 kg H2O/kg dry air, the relative humidity is 34%, and the enthalpy of the air is 80 kJ/kg dry air. respectively.

To determine the specific humidity, relative humidity, and enthalpy of the air, we need to use the psychrometric chart. The psychrometric chart is a graphical representation of the thermodynamic properties of moist air and is used to determine various properties of moist air.

To determine the specific humidity of the air, we need to find the point on the psychrometric chart corresponding to the dry bulb temperature of 28°C and the wet bulb temperature of 15°C. From the chart, we find that the specific humidity of the air is approximately 0.0085 kg H2O/kg dry air.

To determine the relative humidity of the air, we need to find the ratio of the actual vapor pressure to the saturation vapor pressure at the dry bulb temperature of 28°C. From the psychrometric chart, we find that the saturation vapor pressure at 28°C is approximately 3.5 kPa, and the actual vapor pressure is approximately 1.2 kPa. Therefore, the relative humidity of the air is approximately 34%.

To determine the enthalpy of the air, we need to find the point on the psychrometric chart corresponding to the dry bulb temperature of 28°C and the specific humidity of 0.0085 kg H2O/kg dry air. From the chart, we find that the enthalpy of the air is approximately 80 kJ/kg dry air.

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The melting point of (2R,3S)-2,3-dibromo-3-phenylpropanoic acid is dependent on several factors, including the purity of the compound and the presence of any impurities.

Therefore, an exact melting point cannot be provided without specific experimental data. However, it is generally observed that organic compounds have a range of melting points rather than a single specific value.

If you are conducting an experiment and need to determine the melting point of (2R,3S)-2,3-dibromo-3-phenylpropanoic acid, it is recommended to perform the melting point determination experimentally using appropriate laboratory techniques and equipment. This involves heating a small amount of the compound and observing the temperature range at which it melts. The observed melting point can then be compared to known literature values to assess the purity of the compound.

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The formula Molar mass of solute = mass of solute/number of moles of solute can be used to determine the molar mass of a solute if its mass is known.

Avogadro's number (6.022 x 1023) of molecules (or formula units) make up one mole of a substance (ionic compound).

The mass of 1 mole of a chemical is indicated by its molar mass.

It provides you with the amount of grams per mole of a substance, to put it another way.

calculating the solute's mass

Concentration in g/dm = mass of solute in g

0.358/3=  0.119

Volume in dm = 3.

A sodium chloride solution has a 10 g/dm concentration.

3.

Concentration in g/dm = mass of solute in g

Volume in dm = 3.

3\s = 10 g/dm

0.358× 2 dm 3

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The size of micropipette that you would select to deliver 215 microliters would be a micropipette with a volume range of 200-1000 microliters.

What is a micropipette?

A micropipette is a laboratory instrument used to measure and dispense small volumes of liquid, typically in the range of microliters (µL) or nanoliters (nL). They are commonly used in chemistry, biology, and biochemistry experiments, as well as in clinical and industrial settings.

Micropipettes consist of a handle, a digital or manual volume adjustment mechanism, and a tip that is placed into the liquid to be dispensed. They work by creating a vacuum or positive pressure inside the tip, which draws or pushes the liquid out of the tip.

Micropipettes come in different volume ranges and it is important to select the right one to ensure accurate delivery of the desired volume. For example, a micropipette with a volume range of 2-10 microliters would not be suitable for delivering 215 microliters, while a micropipette with a volume range of 200-1000 microliters would be more appropriate.

It's also important to note that, even if the micropipette is able to deliver 215 microliters, you should always check the calibration of the micropipette before use, to make sure that it's delivering the correct volume.

Hence, a micropipette with a volume range of 200-1000 microliters is suitable to deliver 215 microliters.

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Atoms and molecules are the fundamental building blocks of all materials, and they are always in motion due to their kinetic energy.

Kinetic energy is a type of energy that is associated with the motion of an object. It is the energy of a moving object, or the energy that an object possesses due to its motion. Kinetic energy can be calculated by multiplying half of an object’s mass by its velocity squared.

This kinetic energy is the energy carried by an electric current, which is created when the atoms and molecules move and interact with each other. This kinetic energy is the source of many of the properties of materials, such as conductivity and elasticity.

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Answer:

I think its when someone eats only meat

Answer:

A meat eater. Or a animal that has a diet strictly set to other animals.

Explanation:

Hope this helps!

Answer:

The atomic number is located at the upper left of the element.

Hope this helps!! :)

Answer:

You can add coefficients to the middle of chemical formulas to balance

equations

Explanation:

The other three statements are all wrong.

The first statement says you can change the formula of a compound to balance the chemical equation, which is totally wrong.

The third statement is partially correct; you can change coefficients in front of formulas, but you can't change the coefficients in front of symbols. For example, you can't change Ca²⁺ to Ca³⁺ just to balance an equation. These things cannot be changed ever.

The fourth statement is also wrong because conservation of mass is the reason you're balancing the equation in the first place. You balance equations just to make sure there are equal numbers of atoms and/or compound molecules in both sides of the equation. If balancing equations had nothing to do with conservation of mass, then we would not need to balance equations at all.

NaOH(aq) + Fe(NO3)3(aq) →NaNO3(aq)+Fe(OH)3(aq)​

The number of electrons, protons, and neutrons in argon is 18, 18 , and 22 respectively, the number of electrons , protons and neutrons in sulphur-32 is 16, 16, 16 respectively. The number of protons, neutrons, and electrons are 6 , 8 and 6. And for uranium-238 , 92 protons , 92 electrons and 146 neutrons.

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Answer:

The distance between the beginning of the first P wave and the first S wave tells you how many seconds the waves are apart.

Explanation:

This number will be used to tell you how far your seismograph is from the epicenter of the earthquake.

Answer:

The distance between the beginning of the first P wave and the first S wave tells you how many seconds the waves are apart.

Explanation:

This number will be used to tell you how far your seismograph (an instrument that measures and records details of earthquakes, such as force and duration) is from the epicenter (the point on the earth's surface vertically above the focus of an earthquake) of the earthquake. Measure the distance between the first P wave and the first S wave.

Answer:

D. The change in velocity divided by the time during which the change occurs.

Explanation: I took the quiz on Accelerate and it was correct

Answer:

D. The change in velocity divided by the time during which the change occurs.

Explanation:

The reactions that constitute oxidation reaction are, CH3CH2OH --> CH3CHO, CH3CHO --> CH3COOH, CH3CH2CH2OH --> CH3COCH3.

An oxidation reaction is a chemical reaction in which an atom or molecule loses one or more electrons. In the case of alcohols, oxidation typically involves the loss of hydrogen atoms and the addition of oxygen atoms to form a carbonyl-containing functional group.

The reactions that constitute an oxidation reaction are the ones that involve the loss of hydrogen atoms and the addition of oxygen atoms. In the examples given, the following reactions are oxidation reactions:

1) CH3CH2OH --> CH3CHO (oxidation of a primary alcohol to an aldehyde)

2) CH3CHO --> CH3COOH (oxidation of an aldehyde to a carboxylic acid)

3) CH3CH2CH2OH --> CH3COCH3 (oxidation of a secondary alcohol to a ketone)


The other reactions shown do not involve the loss of hydrogen atoms or the addition of oxygen atoms, and therefore do not constitute oxidation reactions.

Oxidation reagents are chemical compounds that are used to carry out oxidation reactions. Some common oxidation reagents include chromic acid (H2CrO4), potassium permanganate (KMnO4), and sodium hypochlorite (NaClO).

The choice of oxidation reagent and the reaction conditions can be used to control the level of oxidation and the products formed.

For example, using a milder oxidation reagent or lower reaction temperatures can help prevent over-oxidation of the alcohol to a carboxylic acid.

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Answer:

w

Explanation:

w

Chemical formula of acetaminophen is C₈H₉NO₂, this drug is also called as paracetamol and is used as a pain killer or an analgesic.

Chemical  formula is a way of representing the number of atoms present in a compound or molecule.It is written with the help of symbols  of elements. It also makes use of brackets and subscripts.

Subscripts are used to denote number of atoms of each element and brackets indicate presence of group of atoms. Chemical formula does not contain words. Chemical formula in the simplest form  is called empirical formula.

It is not the same as structural formula and does not have any information regarding structure.It does not provide any information regarding structure of molecule as obtained in structural formula.

There are four types of chemical formula:

1)empirical formula

2) structural formula

3)condensed formula

4)molecular formula

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The concept molarity is an important method which is used to calculate the concentration of a solution. Here molarity - volume relation is used to find out the concentration of the sodium hydroxide solution.

The term molarity is defined as the number of moles of the solute present per lite of the solution. It is represented as 'M' and it is expressed in the unit mol / L.

The equation connecting molarity and volume is:

M₁V₁ = M₂V₂

M₂ = M₁V₁ / V₂

0.1 × 25 / 20 = 0.125 cm³

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The concentration of ammonia in the solution is 0.02464 mol/L, and calculated based on the amount of hydrochloric acid required to titrate the sample of the solution. To find the concentration of ammonia in the solution, we need to use the equation for the reaction between ammonia (NH₃) and hydrochloric acid (HCl):

NH₃ + HCl → NH₄Cl

From the equation, we can see that one mole of ammonia reacts with one mole of hydrochloric acid to form one mole of ammonium chloride. Therefore, the number of moles of ammonia in the 100.0 ml sample can be calculated as:
moles of NH₃ = moles of HCl = (0.112 mol/L) x (0.022 L) = 0.002464 mol

Next, we can use the equation for the concentration of ammonia in the solution:
concentration of NH₃ = moles of NH₃ / volume of solution (in L)

The volume of the solution is 100.0 ml, which is equivalent to 0.100 L. Therefore, the concentration of ammonia in the solution is:
concentration of NH₃= 0.002464 mol / 0.100 L = 0.02464 mol/L

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Answer: The ratio of the initial volume to final volume for the given gas is 27 to 127 L at constant pressure.

Explanation:

Given: \(T_{1} = 27^{o}C\)

\(T_{2} = 127^{o}C\)

According to Charle's law, for an ideal gas pressure is directly proportional to the temperature at constant pressure.

So, formula used to calculate the ratio of the initial volume to final volume is as follows.

\(\frac{V_{1}}{T_{1}} = \frac{V_{2}}{T_{2}}\)

Substitute the values into above formula as follows.

\(\frac{V_{1}}{T_{1}} = \frac{V_{2}}{T_{2}}\\\frac{V_{1}}{V_{2}} = \frac{T_{1}}{T_{2}}\\\frac{V_{1}}{V_{2}} = \frac{27}{127}\)

Hence, we can conclude that the ratio of the initial volume to final volume for the given gas is 27 to 127 L at constant pressure.

The final volume of the gas is approximately 57.242 mL.

To find the final volume of the gas, we can use the equation for work done by a gas at constant pressure:

Work = -PΔV

Where:

Work is the work done by the gas on its surroundings (given as 119.9 J),

P is the pressure of the gas (given as 783 torr), and

ΔV is the change in volume.

Since the pressure is constant, we can rearrange the equation to solve for ΔV:

ΔV = -Work / P

Plugging in the values:

ΔV = -119.9 J / (783 torr)

We need to convert the pressure from torr to atm to maintain consistent units:

ΔV = -119.9 J / (783 torr * (1 atm / 760 torr))

ΔV = -0.158 L

The negative sign indicates that work is done on the gas, causing it to expand. To find the final volume, we add the change in volume to the initial volume:

Final Volume = Initial Volume + ΔV

Final Volume = 57.4 mL + (-0.158 L)

Final Volume = 57.4 mL - 0.158 mL

Final Volume = 57.242 mL

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Answer:

B

Explanation:

Answer:

Fifth trust me

Explanation:

Answer:

[MgCl₂] = 1.05 m

Explanation:

Molality is a type of concentration that indicates the moles of solute in 1000g of solvent.

m = mol/kg.

Our solute is MgCl₂. We convert mass to moles:

25 g . 1mol / 95.21 g = 0.262 moles.

Our solvent is water → 250 mL of H₂O

We use density to determine the mass: density = m / V

Density . V = m → 0.9975 g/mL . 250 mL = 249.3 g

We convert from g to kg = 249.3 g . 1kg/1000g = 0.2493kg

molality → 0.262 mol /0.2493kg = 1.05

Answer: C.  It is reduced.

Explanation:

Answer:

C

Explanation:

Because it is reduced.

Answer:

mu answer is A

Explanation:

i think it is a popular opinion because its the opinion of a country

Answer:

1.  Place in a platic bag and use a magnet to attract the iron filings.  [See explanation for an alternative step].

2. Disolve the remainer in water

3.  Pass the liquid through a microporous filter to capture the undissolved sulfur

4.  Evaporate the filtered water to retrieve iron chloride crystals

Explanation:

The Fe(II) chloride will dissolve in water.  It is paramagnetic, and thus is weakly attracted to a magnet.  The process above should not result in attracting the solid Fe(II) crystals.  In fact, it is probably acceptable to dissolve the entire sample in water as the fisrt step.  The dissolved Fe(II) chloride should also not be strongly attraced to a magnet, and htis step would allow easier separation of the iron filings.

Sulfur is not soluble in water, so it will collect as a dsolid in the microporous filter.

The Fe(II) has a high solubility, so it will wind up in the filtered soluition.  Evaopate using heat or vacuum to retrieve the solid Fe(II) chloride crystals (they will be hydrated).

The excess methanol helps to drive the reaction towards the desired products by both shifting the equilibrium of the reaction and solubilizing the reactants and products.

The Wintergreen synthesis is a reaction that converts a carboxylic acid (such as salicylic acid) into an ester (such as methyl salicylate) in the presence of an acid catalyst (such as sulfuric acid) and an alcohol (such as methanol).

The reaction is not energetically favored because the carboxylic acid is a more stable molecule than the ester due to the presence of a polar C=O bond, which contributes to the acidity of the molecule. This means that the reverse reaction, the hydrolysis of the ester back into the carboxylic acid, is more thermodynamically favored.

However, the reaction can be forced to proceed by adding a large excess of methanol. This excess of methanol serves two purposes.

Firstly, the excess methanol shifts the equilibrium of the reaction towards the right, according to Le Chatelier's principle. The excess of methanol drives the reaction forward by shifting the equilibrium towards the products, since the concentration of the reactant (the carboxylic acid) is relatively small in comparison.

Secondly, the excess methanol helps to solubilize the reactants and products, making it easier for the reaction to take place.

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The statement describe the transfer of heat is : the ice cubes gains the heat energy and the water looses the heat energy.

The law of mass of conservation mass states that mass neither be created or nor be destroyed. The law of mass of conservation energy states that the heat energy in the isolated system should de constant. if the one thing is loose the energy then the other in will gains the energy in an isolated system. according to the conditions the ice cube is at lower energy .

Thus the ice cube will gains the the heat energy that the water looses the heat energy.

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While testing two pon sites , students found the water went from pH 7 at site a to pH 6 at site b .the students can conclude that the water at site b is 10x more acidic than the water at site a .

pH is the measure of acidity and basicity of a substance .

pH stands for hydrogen potential . it can be defined as the negative log of hydrogen ion concentration .

it can be measured by a pH scale , which ranges from 0 to 14 .

if the pH value is less than 7 , then the compound is called as acidic .

if the Ph value is greater than 7 , then the compound is called as basic .

if the pH is 7 , then the compound is called as neutral compound .

pH equals to 0 , called strongly acidic solution . pH equals to 14 is called strongly  basic solution .

pH does not have units .

The formula for pH is given by ,

pH = - log[H+]

pH zero for 1N solution of strong acid .

pH is negative for concentrations 2N, 3N ,10N of strong acids .

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The false statement is that adding more H2(g) rises the equilibrium constant.

Q can be utilized to predict which way a response will shift to achieve equilibrium. If K > Q, the reaction will continue, converting reagents into products. If K Q, the reaction will go in the opposite direction, converting products back into reactants. If Q = K, the system has already reached equilibrium.

Here are some examples of equilibrium: A book resting on a table. A car moving at a constant speed. A chemical reaction in which the prices of forward and reverse reactions are the same.

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The complete question is-

Consider: H2(g)+I2(s)=2HI(g)

Which of the following statements about the equilibrium is false?

A. If the system is heated, the right side is favored

B. This is a heterogeneous equilibrium

C. If the pressure on the system is increased by changing the volume, the left side is favored

D. Adding more H2(g) increases the equilibrium constant

E. Removing HI as it forms forces the equilibrium to the right