Q1. Choose the correct answer for each of the following sentences and then put the correct choice letter on the above answer sheet. (7.5 points) 1. A sample of oxygen occupies 47.2 liters under a pressure of 1240 torr at 25C. What volume would it occupy at 25C if the pressure was decreased to 730 torr? (a) 27.8L (b) 29.3L (c) 32.3L (d) 47.8L (e) 80.2L 2. The volume of a sample of nitrogen is 6.00 liters at 35C and 740 torr. What volume will it occupy at STP? (a) 6.59L (b) 5.46L (c) 6.95L (d) 5.67L (e) 5.18L 3. What is the molecular weight of a pure gaseous compound having a density 4.95g/L at 35C and 1020 torr? (a) 24 (b) 11 (c) 72 (d) 120 (e) 44 4. A mixture of 90.0 grams of CH4 and 10.0 grams of argon has a pressure of 250 torr under conditions of constant temperature and volume. The partial pressure of CH4 in torr is: (a) 143 (b) 100 (c) 10.7 (d) 239 (e) 125 5. Calculate the weight of KClO3 that would be required to produce 29.5L of oxygen measured at 127C and 760 torr. 2KClO3(s)2KCl(s)+3O2(g) (a) 7.82g (b) 12.2g (c) 14.6g (d) 24.4g (e) 73.5g