Question | Answer |
What is the SI unit used to measure the number of particles? | mole |
How many carbon atoms are in C6H12O6? | 6 |
What are the 7 diatomic molecules? | N, O, F, Cl, Br, I, H |
What is Avagadro's number equal to? | 1 mole |
What is the molar mass of Na2SO4? | 142.04 |
What is the molar volume of a gas a STP? | 22.4 liters |
What is the number of moles in a 700 L of He at STP? | 31.25 moles |
What is the percent composition of Na in Na2SO4? | 32.37% Na |
Which of the following is NOT an empirical formula: C1H2O1 or C6H12O6 | C6H12O6 |
What is the empirical formula of a compound that is 25.5% magnesium and 74.5% chlorine? | MgCl2 |
The molecular formula of a compound can be the same as its empirical formula. True or False? | True |
The molecular formula of a compound can be some whole number multiple of its empirical formula. True or False? | True |
Several comopunds can have the same empirical formula, but have different molecular formulas. True or False? | True |
The empirical formula of a compound can be triple its molecular formula. True or False? | False |
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 |
What is the study of the relationships that can be calculated from chemical formulas and equations? | stoichiometry |
After you have balanced the equation, what is the next step in most stoichiometry problems? | convert the given quantity to moles |
What do the coefficients in a balanced equation represent? | mole ratio |
When 2 substances react to form products, what is the reactant that is completely used up? | limiting reactant |
What is the value obtained when an equation is used to calculate the amount of product that will form during a reaction? | expected yield |
What would likely happen if you were to touch the flask in which an endothermic reaction were occuring? | The flask would feel cooler. |
What happens when energy is converted from one form to another? | the total energy remains the same |
What kind of energy is transferred to due to a temperature difference? | heat energy |
What kind of process absorbs heat? | endothermic process |
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 |
On what principal does calorimetry depend? | Law of Conservation of Energy |
What is the amount of heat needed to melt one mole of a solid at a constant temperature? | molar heat of fusion |