No matter the quantity of a chemical substance, there is always a certain number dictating the ratio between the masses of the elements in it.
Work Step by Step
In both carbon monoxide and hydrogen peroxide, there were specific ratios of the masses of the elements in the substance. Carbon monoxide will always have one carbon atom per one oxygen atom in each molecule, and hydrogen peroxide will always have two hydrogen per two oxygen. The weights of these elements differ but will also stay in constant proportions to each other. These ratios remained the same when the quantities of the substances were changed, signifying that they most probably are constant and independent of the overall quantity.