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.
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