Multiple Choice
Which set of coefficients correctly balances the chemical equation: Mg + O_2 → MgO?
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3. Chemical Reactions
Balancing Chemical Equations
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In the chemical reaction 2H_2 + O_2 ightarrow 2H_2O, what is (are) the starting material(s)?
A
H_2O
B
H_2 and O_2
C
O_2 and H_2O
D
H_2 only
Verified step by step guidance1
Identify the reactants and products in the chemical equation. The reactants are the substances present before the reaction starts, and the products are formed as a result of the reaction.
Look at the given balanced chemical equation: \$2H_2 + O_2 \rightarrow 2H_2O$. The substances on the left side of the arrow are the reactants (starting materials), and those on the right side are the products.
From the equation, the reactants (starting materials) are \(H_2\) and \(O_2\) because they are on the left side of the arrow.
The product formed in this reaction is \(H_2O\), which appears on the right side of the arrow.
Therefore, the starting materials in this reaction are \(H_2\) and \(O_2\).
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