· How many moles are present in 64 g of methane, CH₄? What is the first step that you must do to solve this problem? J

· How many grams are needed for 2 moles of sulfuric acid, H₂SO₄? What is the first step that you must do to solve this problem? J

· How many molecules are present in 88 g of carbon dioxide, CO₂ (molar mass = 44 g)? What is the first step that you must do to solve this problem? J