CHEM1311 | General Chemistry in Chemistry - Houston Community College

How many grams of Li3N can be formed from 1.75 moles of Li? Assume an excess of nitrogen. 6 Li(s) +N2(g) -> 2 Li3N(s) A 18.3 g Li3N B 20.3 g Li3N C 58.3 g Li3N D 61.0 g Li3N How many moles of oxygen are formed when 58.6 g of KNO3 decomposes according to the following reaction? The molar mass of KNO3 is 101.11 g/mol. 4 KNO3(s) -> 2 K2O(s) + 2 N2(g)+ 5 O2(g) A 0.290 mol O2 B 0.580 mol O2 C 18.5 mol O2 D 0.724 mol O2 Consider the following balanced reaction. How many grams of water are required to form 75.9 g of HNO3? Assume that there is excess NO2 present. The molar masses are as follows: H2O = 18.02 g/mol, HNO3 = 63.02 g/mol. 3 NO2(g)+ H2O(l) -> 2 HNO3(aq)+ NO(g) A 38.0 g H2O B 21.7 g H2O C 43.4 g H2O D 10.9 g H2O