Answers to selected questions on the exam Review booklet (due on Monday, June 19th)
Mole Concept
3) Number of moles of propane: 1.66 x 10-4 Mass in grams of propane: 7.3 x 10-3
4a) mass of one atom: 9.2 x 10-20
4c) molecules in a glass of juice: 1.8 x 10 21
5) 0.589 mole of Pb 8) 1.24 M 9) 0.45 moles
Chemical Reactions Review
3) coefficients: 1, 6, 6, 6 6) coefficients: 2, 5, 2
9e) exothermic 9f) endothermic 9g) exothermic h) endothermic
15) HCl + H20----------------H3O+ + Cl-
16d) 1.00 grams of each reactant produces 1.21 g of NH3 since N2 is limiting
Solutions
5c) Final concentrations are: Al+3= 0.03 M Cl-=0.09 M
7) 7.5 M is the solubility of KNO3
