Answer:
<em><u>NA2SO3</u></em> is the reactant in the reaction
Explanation:
The substances which take part in a chemical reaction are called <em><u>reactants</u></em>
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Absorption happens when <span>all of the energy from light waves is transferred to a medium.</span>
The answer is B. This form of magnesium chloride is not a liquid but a solid that is white and colorless.