Consider these intermediate chemical equations. 2 Na s plus Cl sub 2 times g rightarrow 2 NaCl s 2 Na sub 2 cap o s rightarrow 4 Na s plus cap o sub 2 times g In the final chemical equation, NaCl and cap o sub 2 are the products that are formed through the reaction between Na sub 2 cap o and Cl sub 2 Before you can add these intermediate chemical equations, you need to alter them by
Answer
A
multiplying the first equation by 1 half .
B
multiplying the first equation by 2 .
C
multiplying the second equation by 2 .
D
multiplying the second equation by 1 fourth .
Explanation
The second equation produces 4 Na atoms, while the first equation consumes 2 Na atoms. To cancel sodium when the equations are added, multiply the first equation by 2 so it consumes 4 Na atoms. This gives the needed overall reaction forming NaCl and O₂ from Na₂O and Cl₂.
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