Which observation illustrates the law of conservation of mass?
a. burning 10 g of propane produces twice as much carbon dioxide as burning 5 g of propane.
b. the c: o mass ratio of one compound is exactly double that of another compound.
c. when 3 g of carbon reacts with 8 g of oxygen, 11 g of carbon dioxide is produced.
d. the c: o mass ratio of a particular compound is the same, regardless of the size or source of the sample.