Question

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.

Answer 1

Incorrect.

Answer 2

[AI-generated answer — Explain Bot]

Yes, it supports the claim because the reaction equation is balanced. To determine whether evidence supports the claim that mass is conserved in a chemical reaction, you need to ensure that the total mass of the reactants equals the total mass of the products. In this case, the chemical equation for the reaction is H2 + O2 → H2O. This equation is balanced, meaning that the number of atoms of each element is the same on both sides of the equation. Therefore, the total mass of the reactants (hydrogen and oxygen) is equal to the total mass of the products (water). This demonstrates that mass is conserved in the reaction, supporting the claim.