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| Question | Answer |
| Determine the molar mass of the scent of garlic: (C3H5)2S | 114.21 g/mol |
| How many moles are in 100 g of Dinitrogen oxide? | 2.27 mol |
| What is the % composition of each element in caffeine? (C8H10N4O2) | 49.47%C, 5.191%H, 28.86% N, 16.48%O |
| Explain how the mole, molar mass and Avogadro's number are related? | The mass of 6.02 X 1023 particles of a substance is the molar mass. |
| How many particles are in 9.56 mol of Zn? | 5.76X1024 |
| How many moles are in 3.25 X 1020 atoms of lead? | 5.39 X 10-4 |
| A leaf has 1.5 X 10-5 mol of chlorophyll. How many particles is this? | 9.03 X 1018 |
| A compound has 3.86 g of sulfur and 4.08 g of vanadium. How many atoms of each are there? | 7.25 X 1022 atoms S, 4.82 X 1022 atoms V |
| 7.65 g of Co is how many moles? | .130 mol |
| What is the difference between an empirical and a molecular formula? | Empirical formula is simplest ratio. |
| What information do you have to have to find the molecular formula of a compound? | %composition and molar mass |
| List the steps needed to find the empirical formula of a compound? | write % as grams, convert grams to moles, compare the ratios, write the simplest ratios |
| Calculate the empirical formula of a compound with 69.58% Ba, 24.32 %O, 6.09%C. | BaCO3 |
| How many grams are in 0.0550 mol of As? | 4.12 g |
| Which has more atoms, 10 g of C or 10 g of Ca? How many atoms does each have? | 5.01 X 1023 atoms C, 1.50 X 1023 atoms Ca (Carbon) |
| A colorless liquid composed of 46.68% N and 53.32% O has a molar mass of 60.01 g/mol. What is the molecular formula? | N2O2 |