Show that NO and N02 obey the Law of Multiple Proportions?

Question

Nitric oxide. NO. is produced internal combustion engines. When NO comes in contact with air, it is quickly converted into nitrogen dioxide, N02, a very poisonous, corrosive gas. What mass of O is combined with 3.00 g of N in
a) NO and
(b) NO2? Show that NO and N02 obey the Law of Multiple.
Proportions

Answer 1

I think this Q is meant to show you what the law means.

Work out how many g O are combined for each 3.00g N in NO and in NO2. (Hint: in NO, the answer is16.0 x 3.00/14.0)

You will notice something rather obvious about the numbers. I'm afraid thats all there is to it!