Moles and Mass Conversions

1. What tells you how many grams are in one mole of a substance? Avogadro's number molar mass molar volume atomic mass 2. Determine the number of moles for each given mass. Use 3 sig figs in all answers and only write the number. Mass Moles 125 g of carbon dioxide (CO2) 2.84 87.0 g of ammonia (NH3) 5.11 390.0 g of calcium carbonate (CaCO3) 3.90 46.0 g of lithium oxide (Li2O) 1.54 3. Determine the mass of each amount listed. Use 3 sig figs in all answers and only write the number. Moles Mass (g) 3.75 moles of water (H2O) 67.6 2.80 moles of chlorine 199 1.90 moles of sodium bromide (NaBr) 195 6.40 moles of silicon dioxide (SiO2) 385