Methane and Ethane Are Both Made Up of Carbon and Hydrogen

Multiple Choice

Methane and ethane are both made up of carbon and hydrogen. In methane, there are 12.0 g of carbon for every 4.00 g of hydrogen, a ratio of 3:
1 by mass. In ethane, there are 24.0 g of carbon for every 6.00 g of hydrogen, a ratio of 4:
1 by mass. This is a statement of the law of _.

A) multiple proportions
B) conservation of matter
C) octaves
D) conservation of mass
E) constant composition