Question

This formula equation is unbalanced.

P4(s) + Cl2(g) PCl3(l)

Which coefficient should be placed in front of PCl3 to balance this equation?
1246

Answer 1

The answer is: [C]: "4" .
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Note: To balance this equation, the coefficient, "4", should be placed in front of the PCl₃ ; and the coefficient, "6", should be placed in front of the Cl₂ .
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The balanced equation is:
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P₄ (s) + 6 Cl₂ (g) → 4 PCl₃ (l) .
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