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What is the ratio of phosphate to bromine in the following equation 2 P plus 3 Br2 -- 2 PBr3?
Wiki User
∙ 11y ago
The equation 2 P + 3 Br2 -> 2 PBr3 shows the presence of two phosphorus atoms and 6 bromine atoms on each side of the equation. Therefore, the atomic ratio of P to Br is 1:3; both integers are exact. The gram atomic masses of phosphorus and bromine are 30.9738 and 79.904 respectively. Therefore, the mass ratio of Br to P is (3*)(79.904)/30.9738 or 7.73919, to the justified number of significant digits.
______________________
*This integer is exact.
Wiki User
∙ 11y ago
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