1. 7.89 g of a substance X contain 6.28 x 1022 molecules of X. Calculate the molar mass of X in g/mol.
2. Ammonia can be made by reacting calcium cyanamide (CaCN2) with water as shown:
CaCN2 + 3 H2O => CaCO3 + 2 NH3.
How many grams of calcium cyanamide are required to react with 417.8 g of water