7) Assign the oxidation number on nitrogen in each of the following: a) N2H4 b) NO c) N2 d) NO3 : e) NO2 f) NH3 8) Determine what is oxidized and what is reduced in each of the following redox reactions. a) Sn2++2Ce4+Sn4+2Ce3+ b) 2Na+2H2O2NaOH+H2 9) Consider the following chemical equation: 4P+5O22P2O5. a) How many moles of P are required to react completely with 7.2 moles of O2 ? b) How many grams of P are required to react completely with 6.6gO2 ? 10) Consider the following chemical equation: 4NH3()+7O2()4NO2()+6H2O() a) How many moles of NH3 are required to react completely with 5.64molO2 ? b) How many moles of H2O will be produced from 8.95gofNH3 ? c) How many grams of NH3 are required to produce 1.60gNO2? 11) Calculate the volume occupied by 1.5mol of an ideal gas at 25C and a pressure of 0.80atm. ( R=0.08206Latm/molK)