Final Review Chapter 10-12
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| What is the SI unit used to measure the number of particles? | mole
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| How many carbon atoms are in C6H12O6? | 6
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| What are the 7 diatomic molecules? | N, O, F, Cl, Br, I, H
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| What is Avagadro's number equal to? | 1 mole
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| What is the molar mass of Na2SO4? | 142.04
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| What is the molar volume of a gas a STP? | 22.4 liters
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| What is the number of moles in a 700 L of He at STP? | 31.25 moles
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| What is the percent composition of Na in Na2SO4? | 32.37% Na
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| Which of the following is NOT an empirical formula: C1H2O1 or C6H12O6 | C6H12O6
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| What is the empirical formula of a compound that is 25.5% magnesium and 74.5% chlorine? | MgCl2
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| The molecular formula of a compound can be the same as its empirical formula. True or False? | True
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| The molecular formula of a compound can be some whole number multiple of its empirical formula. True or False? | True
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| Several comopunds can have the same empirical formula, but have different molecular formulas. True or False? | True
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| The empirical formula of a compound can be triple its molecular formula. True or False? | False
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| 11. What is the molecular formula of a compound containing 80.00 g C, 13.34 g H, 106.66 g O and a molar mass of 330 g/mol? | C11H22O11
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| What is the study of the relationships that can be calculated from chemical formulas and equations? | stoichiometry
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| After you have balanced the equation, what is the next step in most stoichiometry problems? | convert the given quantity to moles
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| What do the coefficients in a balanced equation represent? | mole ratio
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| When 2 substances react to form products, what is the reactant that is completely used up? | limiting reactant
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| What is the value obtained when an equation is used to calculate the amount of product that will form during a reaction? | expected yield
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| What would likely happen if you were to touch the flask in which an endothermic reaction were occuring? | The flask would feel cooler.
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| What happens when energy is converted from one form to another? | the total energy remains the same
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| What kind of energy is transferred to due to a temperature difference? | heat energy
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| What kind of process absorbs heat? | endothermic process
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| The amount of heat transferred from one object to another depends on what 3 factors? (Think of the "q" formula) | mass, change in temperature, specific heat of the object
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| On what principal does calorimetry depend? | Law of Conservation of Energy
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| What is the amount of heat needed to melt one mole of a solid at a constant temperature? | molar heat of fusion
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