Екатерина Ганженко
Высший разум
(135214)
7 лет назад
1) Mr(H2O) = 18 .
w(H) = 2*Ar(H)*100 / Mr = 2*1*100/18 = 11.1 .
w(O) = Ar(O)*100/18 = 16*100/18 = 88.9%
2)Mr(CaCO3) = 100 .
w(Ca) = 40*100/100 = 40% .
w(C) = 12*100/100 = 12% . w(O) = 3*16*100/100 = 48 %
3) Mr(CO2) = 44
w(C) = 12*100/44 = 27,3% , w(O) = 2*16*100/44 = 72.7 %