P2O5 - оксид фосфора (V)
Mr (P2O5) = 31 * 2 + 16 * 5 = 62 + 80 = 142
W (P) = 62 / 142 * 100 = 43.66 %
P2O3 - оксид фосфора (III)
Mr (P2O3) = 31 * 2 + 16 * 3 = 62 + 48 = 110
W (P) = 62 / 110 * 100 = 56.36 %
P2O5 - оксид фосфора (V)
Mr (P2O5) = 31 * 2 + 16 * 5 = 62 + 80 = 142
W (P) = 62 / 142 * 100 = 43.66 %
P2O3 - оксид фосфора (III)
Mr (P2O3) = 31 * 2 + 16 * 3 = 62 + 48 = 110
W (P) = 62 / 110 * 100 = 56.36 %