Chemistry Question.....?

Question

In demonstrating the Law of Multiple Proportions, the ratio of the masses of oxygen that combine with a given mass of nitrogen in the compounds NO2 and N2O5 is

A) 3:1
B) 2:5
C) 2:3
D) 4:5
E) 2:1

Answer 1

Double NO2 to N2O4, and you will see that the ratio is 4:5.