how many joules must be added to 10 grams of water (I) liquid to raise it's temperature from 10 to 15 degrees C

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.