Each of the questions or incomplete statements below is followed by five suggested answers or completions. Select the one that is best in each case.
When the equation above is balanced and all coefficients are reduced to lowest whole-number terms, the coefficient for is
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This question pertains to the balancing of chemical equations. To answer this question correctly, you need to recognize that both mass and charge must be conserved in any chemical equation. With this in mind, the chemical equation is correctly written as
The coefficient for is .