Question

P4 +6Br2 --> 4PBr3

What is the ratio of the moles of P4 consumed to moles of PBr3 produced?

Answer 1

1 mole of P₄ consumed:4 moles of PBr₃ produced

Step-by-step explanation:

Look at the coefficients in the balanced chemical equation to determine the ratios. For every 1 mole of P₄ consumed (P₄ has a coefficient of 1), 4 moles of PBr₃ would be produced (PBr₃ has a coefficient of 4).

Answer 2

`\boxed {\boxed {\sf 1 \ mole \ P_4 consumed \ to \ 4 \ moles \ PBr_3 \ produced}}`

Step-by-step explanation:

To find the mole ratio, we must use the coefficients.

`P_4+6Br_2 \rightarrow 4PBr_3`

This equation is balanced (4 atoms of P and 12 atoms of Br on both sides), so we can go straight to the coefficients.

• P₄ doesn't have a coefficient, so 1 is implied
• Br₂ has a coefficient of 6
• PBr₃ has a coefficient of 4

So according to the coefficients above, for every 1 mole of P₄ that is consumed, 4 moles of PBr₃ are produced. Therefore, the ratio is 1 mole P₄ to 4 moles of PBr₃.