# Science

A sample of water decomposes to make 4g of hydrogen gas and 32g of oxygen gas. What mass of water decomposed? How do you know?

Hint: The water decomposes into ONLY hydrogen and oxygen, and the total mass does not change in the process.

It's called the Law of Conservation of Mass.

1. 👍 0
2. 👎 0
3. 👁 174
1. 36g

1. 👍 0
2. 👎 0

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