Determine the mass fraction of phosphorus in phosphorus oxide P2O3.
| January 5, 2021 | education
In order to calculate the mass fraction of phosphorus in phosphorus oxide, it is necessary to find the ratio of the molar weights of phosphorus atoms in the oxide molecule to the molar weight of phosphorus oxide.
Trivalent oxide consists of two phosphorus atoms and three oxygen atoms.
M P2 = 31 x 2 = 62 grams / mol;
M P2O3 = 31 x 2 + 16 x 3 = 110 grams / mol;
The mass fraction of phosphorus in phosphorus oxide will be:
K = M P2 / M P2O3 = 62/110 = 0.564 = 56.4%
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