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Science 9 Online
Astrid1:

Help

Astrid1:

Vocaloid:

Conservation of matter means that matter is neither created nor destroyed during a chemical reaction This means both sides of the equation should have equal numbers of the same atoms Looking at answer choice 1, there’s 12 hydrogen atoms on the left and 6 on the right so it can’t be the first choice. Repeat w/ the other choices.

Astrid1:

Tankz! (:

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