Question

when you burn a candle, all that remains is a puddle of wax. the puddle of wax has less mass than the original candle. the rest of the candle’s original mass was
a changed to gases
b measured incorrectly
c destroyed
d none of

Explanation:

When a candle burns, it undergoes a chemical reaction (combustion) where wax reacts with oxygen. The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction, but it can change form. The wax that burns is converted into gaseous products (like carbon dioxide and water vapor), so the missing mass from the original candle is changed to gases. Option B is incorrect as the question is about the scientific principle, not measurement error. Option C is wrong because mass isn't destroyed, just transformed.

Answer:

A. changed to gases