a. Calculate the partial pressure of oxygen in a jug that has a 2.0 mol of oxygen, 3.0 mol of nitrogen, and the 1.0 mol of carbon dioxide when its whole pressure is 900 mmHg?
b. The molecular weight of an unknown gas was calculated by an effusion research. It was found that it took 64 seconds for the gas to effuse, where as nitrogen gas needed 48 seconds. Find out the molecular mass of the gas in detail.