When 20 g of mercury (II) oxide was heated, it produces g of oxygen

A 1.8

B 1.6

C 1.3

D 1.2

Fill in the blanks for the following statements: the rms speed of the molecules in a sample of h2 gas at 300 k will be times larger than the rms speed of o2 molecules at the same temperature, and the ratio µrms (h2) / µrms (o2) with increasing temperature.