According to the law of multiple proportions:
A) if the same two elements form two difference compounds, they do so in a the same ratio.
B) it is not possible for the same two elements to form more than one compound
C) the ratio of the masses of the elements in a compound is always the same.
D) the total mass is the same after a chemical change as before the change.
E) None of these.
Answer: E) None of these.