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The chemical equation for the reaction between magnesium (Mg) and hydrochloric acid (HCl) is shown.

Mg + 2HCl → MgCl2 + H2

Fiona weighs the magnesium and hydrochloric acid before the reaction and finds a total mass of 55 grams. After the reaction, she measures the mass of the products, magnesium chloride (MgCl2) and hydrogen (H2), and finds a total mass of 55 grams again. Does Fiona's data support the law of conservation of matter, and why?

a
Yes, because the mass of the reactants is lower than the mass of the products in her data.
b
Yes, because the mass of the reactants is the same as the mass of the products in her data.
c
No, because the mass of the reactants is lower than the mass of the products in her data.
d
No, because the mass of the reactants is the same as the mass of the products in her data.

b) Yes, because the mass of the reactants is the same as the mass of the products in her data. The law of conservation of matter states that matter cannot be created or destroyed in a chemical reaction, only changed in form. In this case, the total mass of the reactants before the reaction is equal to the total mass of the products after the reaction, which supports the law of conservation of matter.