8. Which of the following explains why the chemical products from a reaction have a different mass than the chemicals at the beginning?
The products are heavier and sink.
The products are lighter and rise.
The products are a gas and escape into the air.
The products are a solid and have more mass.
My answer would be d.
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All answers are wrong, if you include released gases among the products. The total mass stays the same, except for a very small mass loss (E/c^2) due to Einstein's Theory of Relativity.
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