Chemical Calculations: Chapter 3 Stoichiometry: mass, formulas, and reactions 3.2 The mole 1. How many moles of Mg is 3.011022 atoms of Mg ? 2. How many molecules are there in 4 moles of glucose? 3. How many atoms are in 0.750 moles of Zn ? 4. Determine the molar mass of ammonia (NH3) a. How many moles are in 3.4g of ammonia? 5. What is the mass of 0.57 moles of Nitrite (NO2)? 6. What mass of hydrogen can be produced from 13g of phosphoric acid? 3.3 Balancing Equations 1. Balance the following equations: 2. a. P4+O2P2O3 a. CF4+Br2CBr4+F2 3. a. Na3PO4+CaCl2CaCl3(PO4)2 3.4 Combustion Reactions 4. Write and balance the combustion reactions below: a. Methane (CH4)+ oxygen b. Butane (C4H10)+ oxygen c. Hexane (C6H14)+ oxygen