Calculate the mass fractions of chemical elements in phosphoric acid
| March 2, 2021 | education
W = Ar (element) * n: Mr (compound) * 100%
Mr (H3PO4) = 1 * 3 + 31 + 16 * 4 = 98;
W (H) = 1 * 3: 98 * 100% = 3%;
W (P) = 1 * 31: 98 * 100% = 31%;
W (O) = 16 * 4: 98 = 65%;
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