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chemistry

A student claims that the reaction of hydrogen and oxygen to form
water is evidence supporting the claim that mass is conserved in a
chemical reaction. The chemical equation the student uses for the
reaction is H2 + O2 --> H2O.
Does this evidence support the claim? Why or why not? '

-Yes, it supports the claim because all the elements in the reactants appear in the product.

-No, it does not support
the claim because it is not a closed system.

-Yes, it supports the claim because the reaction equation iS balanced.

-No, it does not support
the claim because the reaction equation is not balanced.

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  1. Incorrect.

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