Cu2o, cuo, cuso4, w(cu) ну типа как: пример n2o w(n)=28/108*100%=26% - вопрос №787753524228108100261002 от margocharlip0cmwu 11.07.2021 19:27

Question

Химия: Cu2o, cuo, cuso4, w(cu) ну типа как: пример n2o w(n)=28/108*100%=26% w(o)=100-26=74

margocharlip0cmwu · Answer

1) Mr (Cu2O) = 2 * 64 + 16 = 144w (Cu) = 128/144 * 100% = 89%w (O) = 16/144 * 100% = 11%2) Mr (CuO) = 64 + 16 = 80w (Cu) = 64/80 * 100% = 80%w (O) = 16/80 * 100% = 20%3) Mr (CuSO4) = 64 + 32 + 4 * 16= 160w (Cu) = 64/160 * 100% = 40%w (S) = 32/160 * 100% = 20%w (O) = 64/160 * 100% = 40% W(cU) - это что такое?...