Answers
Related Questions
At the beginning of the reaction the forward reaction rate is ____ the reverse reaction rate
Answers
Answer:
The appropriate answer to the question in the discussion would be "negligible".
Explanation:
Equilibrium specifies "The state in something like a balanced or reversible equation where the frequency including forwarding public response seems to be equal or directly proportional to the rate of the backward process which is defined as the stable equilibrium".Initially, the rate including its reaction seems to be negligible. It's speeding up progressively.So that the above is the right answer.
Answer:
Greater than
Explanation:
Just took it on edge
How many atoms are in mercury phosphate
Answers
Answer:
There are 95 atoms in mercury phosphate
Explanation:
You just add the atomic number for both elements
hii can someone help this is a very important unit quiz i have to take
Answers
Answer:
the answer is D: 1.67 x 10^-24g
The answer to this question is D 1.67 × 10^-²⁴g
a hot liquid located under earth's surface?
Answers
Answer:
Magma
Explanation:
Magma is the hot liquid under earths surface
HELP PLZ!!! A sample contains only the compound CaCl2 and water. When it is dried, its weight decreases from 5.00g to 4.24g. What is the mass percentage of water in the original sample? Round to three significant figures.
Answers
Answer:is 15.2%
Explanation:
Got it wrong and this the correct answer it told me
The percentage of water in the original sample is 15.2 %.
From the information provided in the question;
Weight of the wet sample = 5.00g
Weight of the dried sample = 4.24g
Loss in mass = 5.00g - 4.24g = 0.76 g
percentage of water in the original sample = Difference in mass between wet and dry sample/ mass of wet sample × 100/1
Hence, when we substitute values;
percentage of water in the original sample = 0.76 g/5.00g × 100/1
percentage of water in the original sample = 15.2 %
So, the percentage of water in the original sample is 15.2 %.
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An electron has a
charge.
Answers
An electron has a negative charge.
The charge of an electron is a fundamental property of the particle, and it is denoted by the symbol "e." The magnitude of the charge of an electron is approximately 1.602 × 10^-19 coulombs (C). This value is considered the elementary charge and is used as a reference for other charges. The charge of an electron plays a significant role in determining the behavior and interactions of atoms and molecules. It is opposite in sign to the charge of a proton, which is positive. The electron's charge allows it to interact with other charged particles, such as protons and ions, through electrostatic forces. Electrons are subatomic particles that orbit the nucleus of an atom in specific energy levels or orbitals. They contribute to the overall stability and chemical properties of atoms and participate in chemical bonding and reactions. The movement of electrons between atoms is what enables the formation of chemical bonds and the sharing or transfer of electrons to create ions. In summary, the charge of an electron is negative, and it plays a fundamental role in the structure and behavior of atoms and molecules.
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Which question can be answered by science A:which type of candy taste best B:which kind of backpack do students purchase most often C:why are children happy when they get home D:why should we help those less fortunate than us
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Answer:B: Which type of backpack do students purchase most often
Explanation: The right answer is B. because its a question you can graph informational data about, unlike any other answer. Hope this helped!
~Emilie Greene
What happens to the energy produced by blocks of Earth's crust slipping past each other? (1 point)
O It disappears at it moves through the crust.
OIt spreads out in random directions.
OIt radiates outward in all directions.
OIt increases as it reaches the surface.
Answers
What happens to the energy produced by blocks of Earth's crust slipping past each other is it radiates outward in all directions. (Option C).
What happens to the energy?When blocks of the Earth's crust slip past each other during an earthquake, the energy that is released does not disappear, spread out randomly, or increase as it reaches the surface.
Instead, the energy radiates outward in the form of seismic waves. These seismic waves travel through the Earth in all directions from the point of the earthquake's origin causing the ground to shake.
The energy carried by these waves is what is felt as the shaking during an earthquake and can be detected and measured by seismometers.
Thus, what happens to the energy produced by blocks of Earth's crust slipping past each other is it radiates outward in all directions.
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what happen in the reactivity of non metal when it's atomic size increases?why?
Answers
Answer:
The propensity of nonmetals to acquire electrons determines their reactivity. The tendency to gain electrons diminishes as we progress down the group because the effective nuclear charge lowers as the atomic size rises.
Explanation:
Brainliest Pls
Write the chemical symbols for three different atoms or atomic anions with 23 electrons.
Answers
Krypton, Chromium, and Oxygen with the following symbols Kr-13, Cr-2, and O-15 respectively have 23 electrons.
The atomic number of an atom determines the number of electrons it has. When the number of protons is equivalent to the number of electrons, the atom is electrically neutral. An anion, on the other hand, is an atom with a negative charge. It has gained an electron or two, or even more. Below are the chemical symbols for three different atoms or atomic anions with 23 electrons.Krypton:Kr has an atomic number of 36, indicating that it has 36 electrons. However, if we add 13 electrons to it, the total number of electrons becomes 49. Krypton with 13 additional electrons becomes Kr-13, with a total of 49 electrons.Chromium:Cr has an atomic number of 24, indicating that it has 24 electrons. Adding two more electrons to it, the total number of electrons becomes 26. The atomic anion with 26 electrons is Cr-2.Oxygen:Oxygen has an atomic number of 8, indicating that it has 8 electrons. However, if we add 15 electrons to it, the total number of electrons becomes 23. Oxygen with 15 additional electrons becomes O-15, with a total of 23 electrons.
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Example of a computer using energy
Answers
Answer: Booting up the computer: When you turn on the computer, it requires a burst of energy to start up the various components and initialize the operating system.
Explanation:
How do chemical reactions differ from nuclear reactions? (2 points) Chemical reactions involve electrons and protons, and nuclear reactions only involve protons. Chemical reactions involve changes in bonding, and nuclear reactions involve changes in an atom's nucleus. Chemical reactions involve forming bonds, and nuclear reactions involve breaking bonds. Chemical reactions involve sharing of electrons, and nuclear reactions involve the formation of ions.
Answers
Nuclear reactions include a change in the nucleus of an atom, which typically results in the production of a new element. Contrarily, chemical reactions only require the rearrangement of electrons and do not affect the nuclei; rather, they entail changes in bonding.
What is a nuclear reaction & a chemical reaction?
Nuclear fission or fusion processes were necessary for the synthesis of elements (decay). Atomic atoms' nuclei are the site of nuclear reactions, as the name suggests.Outside the atom's nucleus, in the electron cloud, chemical processes take to occur. The electromagnetic force is present during chemical processes. An atom's s and p subshells are where most chemical reactions take place. Valence electrons are those located in the outermost s and p subshells.Most of the operations we are acquainted with are powered by chemical reactions, including food digestion, and the conversion of carbohydrates into energy. Chemical processes lack the energy of nuclear reactions. In the atomic core, protons and neutrons participate in nuclear processes. Electrons orbit the nucleus during chemical reactions.Therefore it is concluded that option (B) is correct.
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What is the binding energy for the nuclide 199F (atomic mass: 18.9984 amu) in MeV per nucleus?
Answers
The binding energy per nucleon for the ¹⁹F nucleon is equal to 7.786 MeV/nucleon.
What is binding energy?Binding energy can be defined as the minimum quantity of energy that is required to remove the particle from the system. Nuclear binding energy can be described as the energy required to dismantle a nucleus of an atom into free neutrons and protons.
The binding energy will be determined from the mass defect. Mass defect is calculated from the difference between the mass observed and the expected combined mass.
Given the mass of the ¹⁹F = 18.9984 a.m.u.
The mass defect for the ¹⁹F can be calculated as:
Δm = \((M _n +M_p) - M_F\)
\(\triangle m =( 9\times 1.0078 + 10 \times 1.0087 )- 18.9984\)
\(\triangle m =0.1588 \;a.m.u.\)
The binding energy for the fluorine can be calculated as:
E = Δmc²
E = 0.1588 × 931.5
E = 147.92 MeV
The binding energy per nucleon of ¹⁹F can be calculated as:
B.E.N. = 147.92/18.9984 = 7.786 MeV per nucleon
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What mass of nitrogen (N2) is needed to produce 0.125 mol of ammonia (NH3)? Input a numerical answer only. N2 + 3H2 ---> 2NH:
Please help me
Answers
98 KB
Very sorry if this is wrong!
1. A sample of commercial concentrated hydrochloric acid is 11.8 M HCl and has a density of 1.190 g/mL. Calculate (a). the mass % of HCI (b). the molality of HCI (c). the mole fraction of HCI
Answers
(a) The mass percent of HCl in the solution is approximately 36.1%.
(b) The molality of HCl in the solution is approximately 15.5 mol/kg.
(c) The mole fraction of HCl in the solution is approximately 0.218.
(a) To calculate the mass percent of HCl, we need to determine the mass of HCl in a given volume of the solution.
Given: Concentration of HCl = 11.8 M
Density of the solution = 1.190 g/mL
First, we need to calculate the mass of the solution. Since density is mass per unit volume, the mass of 1 mL of the solution is 1.190 g.
Next, we need to calculate the mass of HCl in 1 mL of the solution. Since the concentration is given in moles per liter (M), and the molar mass of HCl is 36.46 g/mol, we can calculate the mass of HCl in 1 mL as follows:
Mass of HCl = concentration × volume × molar mass
= 11.8 mol/L × 0.001 L × 36.46 g/mol
= 0.430 g
Now, we can calculate the mass percent of HCl using the following formula:
Mass percent = (mass of solute ÷ mass of solution) × 100
= (0.430 g ÷ 1.190 g) × 100
≈ 36.1%
(b) The molality of HCl is calculated by dividing the moles of solute (HCl) by the mass of the solvent (water) in kilograms.
Since the density of the solution is given as 1.190 g/mL, the mass of 1 mL of the solution is 1.190 g. However, we need to consider the density of the solvent (water) to calculate the mass of water in the solution.
Assuming the density of water is 1 g/mL, the mass of water in 1 mL of the solution is (1.190 g - 0.430 g) = 0.760 g.
To calculate the molality of HCl, we need to convert the mass of water to kilograms:
Mass of water (kg) = 0.760 g ÷ 1000 = 0.000760 kg
The molality (m) is calculated using the formula:
Molality = (moles of solute ÷ mass of solvent in kg)
= (11.8 mol/L × 0.001 L) ÷ 0.000760 kg
≈ 15.5 mol/kg
(c) The mole fraction (X) of HCl is calculated by dividing the moles of HCl by the total moles of all components in the solution.
To calculate the mole fraction, we need to consider the volume of the solution and convert it to liters.
Given: Concentration of HCl = 11.8 M
Volume of the solution = 1 mL
Volume of the solution (L) = 1 mL ÷ 1000 = 0.001 L
To calculate the mole fraction of HCl, we need to calculate the moles of HCl and the moles of water (solvent) in the solution.
Moles of HCl = concentration × volume
= 11.8 mol/L × 0.001 L
= 0.0118 mol
Moles of water = mass of water ÷ molar mass of water
= 0.760 g ÷ 18.015 g/mol (molar mass of water)
= 0.0422 mol
Total moles in the solution = moles of HCl + moles of water
= 0.0118 mol + 0.0422 mol
= 0.054 mol
Mole fraction of HCl = moles of HCl ÷ total moles
= 0.0118 mol ÷ 0.054 mol
≈ 0.218
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9. If 28.56 g of K2O is produced when 25.00 g K is reactedaccording to the following equation, what is the percent yieldof the reaction? (molar mass of K2O = 94.20 g/mol)4 K(s) + O2(g) → 2 K20(s)a. 87.54%b. 95%c. 94.85%d. 88%
Answers
Answer
b. 95%
Explanation
Given:
Mass of K₂O produced (actual yield) = 28.56 g
Mass of K that reacted = 25.00 g
Equation: 4K(s) + O₂(g) → 2K₂0(s)
What to find:
The percent yield of K₂O.
Step-by-step solution:
The first step is to calculate the theoretical yield of K₂O produced.
From the balanced equation, 4 mol K produced 2 mol K₂O
Molar mass of K₂O = 94.20 g/mol)
Molar mass of K = 39.10 g/mol)
This means 4 mol x 39.10 g/mol = 156.40 g K produced 2 mol x 94.20 g/mol = 188.40 g K₂O
So 25.00 g K will produce:
\(\frac{25.00\text{ }g\text{ }K\times188.40\text{ }g\text{ }K₂O}{156.40\text{ }g\text{ }K}=30.1151\text{ }g\text{ }K₂O\)Actual yield of K₂O = 28.56 g
Theoretical yield of k₂O = 30.1151 g
The percent yield for the reaction can now be calculated using the formula below:
\(\begin{gathered} Percent\text{ }yield=\frac{Actual\text{ }yield}{Theoretical\text{ }yield}\times100\% \\ \\ Percent\text{ }yield=\frac{28.56\text{ }g}{30.1151\text{ }g}\times100\% \\ \\ Percent\text{ }yield=0.9484\times100\% \\ \\ Percent\text{ }yield=94.84\%\approx95\% \end{gathered}\)Therefore, the percent yield for the reaction is 95%.
Write in Scientific Notation 1,060,000,000
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Is this equation balanced?
3kBr + FeCl3 -> FeBr + 3KCl
A) No, it’s not balanced. The K atoms are not balanced.
B) Yes, it’s balanced.
C) No, it’s not balanced. The Br atoms are not balanced.
D) No, it’s not balanced. The Fe atoms are not balanced.
Answers
The balanced equation should be:
3KBr + FeCl3 → FeBr3 + 3KCl
In the balanced equation, both the number of Fe and Br atoms are equal on both sides of the equation.
Answer:
The given equation is not balanced.
On the left-hand side, there are 3 atoms of potassium (3K), 3 atoms of bromine (3Br), and 1 atom of iron (Fe).
On the right-hand side, there is 1 atom of bromine (Br), 3 atoms of potassium (3K), and 1 atom of iron (Fe).
The number of atoms of each element should be equal on both sides of the equation. Therefore, to balance the equation, we need to adjust the coefficients of the molecules.
The balanced equation is:
3kBr + FeCl3 -> FeBr3 + 3KCl
The balanced equation has 3 atoms of potassium (3K), 3 atoms of bromine (3Br), 1 atom of iron (Fe), and 3 atoms of chlorine (3Cl) on both sides of the equation.
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Homework Answered Due Today, 11:59 PM
The reaction 3H₂(g) + N₂(g) → 2NH3(g) has an enthalpy of reaction of -92.6 kJ/mol. If 1 g of hydrogen and 2 g of nitrogen are
reacted, how much heat is produced (kJ)?
Answers
The amount of heat energy produced when 1 g of hydrogen and 2 g of nitrogen are reacted, is -6.61 KJ
How do i determine the heat energy produced?First, we shall obtain the limiting reactant. Details below:
3H₂ + N₂ -> 2NH₃
Molar mass of N₂ = 28 g/molMass of N₂ from the balanced equation = 1 × 28 = 28 g Molar mass of H₂ = 2 g/molMass of H₂ from the balanced equation = 3 × 2 = 6 gFrom the balanced equation above,
28 g of N₂ reacted with 6 g of H₂
Therefore,
2 g of N₂ will react with = (2 × 6) / 28 = 0.43 g of H₂
We can see that only 0.43 g of H₂ is needed in the reaction.
Thus, the limiting reactant is N₂
Finally, we the amount of heat energy produced. Details below:
3H₂ + N₂ -> 2NH₃ ΔH = -92.6 KJ
Molar mass of N₂ = 28 g/molMass of N₂ from the balanced equation = 1 × 28 = 28 gFrom the balanced equation above,
When 28 grams of N₂ reacted, -92.6 KJ of heat energy were produced.
Therefore,
When 2 grams of N₂ will react to produce = (2 × -92.6) / 28 = -6.61 KJ
Thus the heat energy produced from the reaction is -6.61 KJ
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Enter the balanced net ionic equation for the potentially unbalanced equation NH4Cl(aq)+NaOH(aq)→H2O(l)+NH3(g)+NaCl(aq).
Answers
Answer:
NH₄⁺ (aq) + OH⁻ (aq) → H₂O (l) + NH₃ (g)
General Formulas and Concepts:
Chemistry - Solutions
Solubility RulesReaction PredictionCompound statesExplanation:
Step 1: RxN
NH₄Cl (aq) + NaOH (aq) → H₂O (l) + NH₃ (g) + NaCl (aq)
Step 2: Balance RxN
NH₄Cl (aq) + NaOH (aq) → H₂O (l) + NH₃ (g) + NaCl (aq)
1 N on each side5 H on each side1 Cl on each side1 Na on each side1 O on each sideAlready balancedStep 3: Ionic Equations
Total Ionic Equation
Break up aqueous solutions.
NH₄⁺ (aq) + Cl⁻ (aq) + Na⁺ (aq) + OH⁻ (aq) → H₂O (l) + NH₃ (g) + Na⁺ (aq) + Cl⁻ (aq)
Net Ionic Equation
Cancel out spectator ions.
NH₄⁺ (aq) + OH⁻ (aq) → H₂O (l) + NH₃ (g)
Which of the following chemical formulas represents a common acid?
*
NaOH
KI
HCI
H20
Answers
Determine the value of Kc for the following reaction, if the equilibrium concentrations are as follows: [N2]eq = 2.66 M, [H2]eq = 0.64 M, [NH3]eq = 3.34 M.
N2(g) + 3 H2(g) ⇌ 2 NH3(g)
Answers
The value of Kc for the given reaction is 0.0579 (rounded to four decimal places).
The formula for the equilibrium constant, Kc, of a reaction is given by the ratio of the product of the concentrations of the products raised to their respective stoichiometric coefficients to the product of the concentrations of the reactants raised to their respective stoichiometric coefficients.
The stoichiometric coefficients are the coefficients in the balanced chemical equation.
To determine the value of Kc for the reaction given by the following chemical equation:N2(g) + 3 H2(g) ⇌ 2 NH3(g)
we first need to write the expression for Kc.
The expression for Kc is given by the following formula:Kc = [NH3]² / [N2][H2]³.
We are given the equilibrium concentrations as follows:[N2]eq = 2.66 M[H2]eq = 0.64 M[NH3]eq = 3.34 M
We can substitute these values into the expression for Kc and obtain the following:Kc = (3.34)² / (2.66)(0.64)³ = 0.0579 (rounded to four decimal places).
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conclusion of solution and filteration of organic compounds method
Answers
Filtration is the process of passing a liquid containing contaminants through a filter to get a cleaner liquid.
What can you conclude after learning about filtration of solutions of organic compounds?After filtration impurities are left on the filter when the liquid goes through it, resulting in a cleaner combination. The procedure of separating one ingredient from another in a compound is used in the purification of chemical compounds or any materials. A mixed sample is turned into fresh samples, each of which contains a single ingredient.Separation procedures are then utilised to separate these compounds. These techniques alter the relative proportions of components in a combination.The type of the compounds and the impurities in them influence the purification of organic chemicals and compounds.
Purification of compounds can be done in other methods as well such as distillation, chromatography, sublimation and crystallisation.
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Full question:
What can you conclude after learning about filtration of solutions of organic compounds? Name other methods of purification of compounds.
Epinephrine is a hormone secreted into the bloodstream in times of danger and stress. It is 59% Carbon, 7.1% Hydrogen, 26.2% Oxygen and 7.7% Nitrogen by mass. Determine the empirical formula. The molar mass is 148 g/mol.
Answers
The empirical formula for epinephrine is C₉H₁₃NO₃.
What is the empirical formula?The empirical formula can be described as the simplest ratio of the number of elements present in a compound. The molecular formula can be defined as a multiple of the empirical formula of a compound.
The empirical formula provides the ratio of the number of atoms and the percentage composition directly gives its empirical formula.
Given, the amount of Carbon in the Epinephrine = 59 % = 0.59 g
the amount of Hydrogen in the Epinephrine = 7.1 % = 0.07 g
the amount of Oxygen in the Epinephrine = 26.2 % = 0.262 g
the amount of Nitrogen in the Epinephrine = 7.7 % = 0.077 g
The number of moles of Carbon = 59/12 = 4.91
The number of moles of Hydrogen = 7.1/1 = 7.1
The number of moles of Oxygen = 26.2/16 = 1.64
The number of moles of Nitrogen = 7.7/14 = 0.55
The ratio of C : H : O : N can be represented as 4.91 : 7.1 : 1.64 : 0.55
The simplest ratio is 9 : 13 : 3 : 1
Therefore, the empirical formula of Epinephrine is C₉H₁₃NO₃.
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Electrons further from the nucleus are partially shielded from the pull of the nucleus.
True
False
Answers
Hope this helps
What is the mass of HCl that is produced from 20 g of TiCl4?TiCl4 + 2 H2O → TiO2 + 4 HCl
Answers
We have to assume all the 20 g will react.
Now, the proportion on the equation is in moles, not in mass, so the first step is to convert the mass of TiCl₄ to number of moles of TiCl₄.
To do this, we will need the molar mass of TiCl₄, which we can calculate from theatomic weights of the atoms in int, Ti and Cl.
After we have the number o moles of TiCl₄, we can apply the proportion using the coefficients of TiCl₄ and the product we want, HCl. This will give the number of moles of HCl produced.
Lastly, we will need to convet this number of moles of HCl to mass of HCl, so we will also need the molar mass of HCl, which we can calculate from the atomic weights of H and Cl.
So, we will do the following:
1 - Calculate the molar masses of TiCl₄ and HCl
2 - Convert mass of TiCl₄ to number of moles of TiCl₄
3 - apply the proportion on the equation to convert from number of moles of TiCl₄ to number of moles of HCl
4 - Convert number of moles of HCl to mass of HCl.
1 - The molar mass is the sum of the atomic weights of each atom, so we will add 1 atomic weight of Ti and 4 atomic weights of Cl:
\(M_{TiCl_4}=1\cdot M_{Ti}+4\cdot M_{Cl}=1\cdot47.867g/mol+4\cdot35.453g/mol=189.679g/mol\)Now we do the same for HCl:
\(M_{HCl}=1\cdot M_H+1\cdot M_{Cl}=1\cdot1.00794g/mol+1\cdot35.453g/mol=36.46094g/mol\)2 - The molar mass is the mass divided by the number of moles, so:
\(\begin{gathered} M_{TiCl_{4}}=\frac{m_{TiCl_4}}{n_{TiCl_{4}}} \\ n_{TiCl_4}=\frac{m_{TiCl_4}}{M_{TiCl_{4}}}=\frac{20g}{189.679g/mol}=0.10544\ldots mol \end{gathered}\)3 - Since the coefficient of TiCl₄ is 1 and the coefficient of HCl is 4, we have the following:
TiCl₄ --- HCl
1 --- 4
\(\begin{gathered} \frac{n_{TiCl_4}}{1}=\frac{n_{HCl}}{4} \\ n_{HCl}=4n_{TiCl_4}=4\cdot0.10544\ldots mol=0.42176\ldots mol \end{gathered}\)4 - Using the same equation for molar mass but now for HCl, we have:
\(\begin{gathered} M_{HCl}=\frac{m_{HCl}}{n_{HCl}} \\ m_{HCl}=n_{HCl}\cdot M_{HCl}=0.42176\ldots mol\cdot36.46094g/mol=15.3779\ldots g\approx15g \end{gathered}\)So, approximately 15g of HCl will be produced.
Please if you know the answer put it thanks
Answers
The diagram shows a picture of a compound.
What is a compound?A compound is a substance that is made up of two or more different elements that are chemically bonded together in a specific ratio.
This means that the elements are combined in a way that creates a new substance with different physical and chemical properties than the individual elements.
Compounds can be formed through a variety of chemical reactions, such as combining elements through a chemical bond or through a reaction between an acid and a base.
So for the given diagram, we can see that it represents two or more elements chemically combined.
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Which two statements describe a way that an other-feeder gets food?
A. Sphagnum moss takes in energy from sunlight.
B. Paramecia sweep food into mouthlike openings.
C. A bear eats the fish that it catches.
D. A. pine tree carriers out photosynthesis.
Answers
Paramecia sweep food into mouthlike openings and a pine tree carriers out photosynthesis. These describe a way that an other-feeder gets food. The correct option is option B,D.
Filter feeders are a subclass of animals that eat by sifting food particles and suspended materials from water, often by running the water through a specially designed filtering apparatus. Baleen whales, clams, krill, sponges, various fish (including some sharks), and krill are just a few species that adopt this technique of eating. Paramecia sweep food into mouthlike openings and a pine tree carriers out photosynthesis. These describe a way that an other-feeder gets food.
Therefore, the correct option is option B,D.
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Which molecules would be polar? Select all that apply.
A linear molecule with two equivalent polar bonds
A bent molecule with one polar bond and one non polar bond
A linear molecule with two non polar bonds
A linear molecule with one polar and one non polar bond
A bent molecule with two non polar bonds
A bent molecule with two equivalent polar bonds
Answers
A polar molecule is a molecule that has an overall dipole moment. This depends on the structure of the molecule.
The molecules that will be polar include;
A bent molecule with one polar bond and one non polar bond
A linear molecule with one polar and one non polar bond
A bent molecule with two equivalent polar bonds
A bent molecule with two non polar bonds
The presence of polar bonds does not automatically mean that a molecule will be polar.
Polarity also has to do with the structure of the molecule. This means the actual arrangement of atoms in the molecule.
All bent molecules are polar due to asymmetrical electron distribution in bent molecules.
However, a linear molecule with two equivalent polar bonds will be non polar since the dipoles will cancel out. If the linear molecule has one polar and one non polar bond, the molecule will have an overall dipole moment and will therefore be polar.
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Calculate the mass percent by volume of 34.1 g of glucose
(C.H120., MM = 180.2 g/mol) in
325 mL of solution.
Answers
Answer:
10.5%
Explanation:
The equation used to calculate mass percent by volume is:
Mass Solute (g)
Mass/Volume % = ----------------------------------- x 100%
Volume Solution (mL)
In this case, the solute is the glucose. You can plug the given values into the equation and solve.
34.1 g C₆H₁₂O₆
Mass/Volume % = ------------------------------- x 100%
325 mL soln
Mass/Volume % = 0.105 x 100%
Mass/Volume % = 10.5%