Mr(CaCO3)=40+12+16*3= 100
Mr(H3PO4) = 1*3+31+16*4 = 98
Mr(KNO3)=39+14+16*3 = 101
Mr(H2S)=1*2+32= 34
HCl + NH3 -> NH4Cl
n(NH4Cl) = 20г/(14+4+35.5)г/моль = 0.37 моль
n(NH4Cl)= n(HCl) = 0.37моль
V(HCl) = 0.37моль * 22.4 л/моль =8.288 л.
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СО+O2 = 2СО2
CО2+CaО = CaСО3
CaСО3=CaО+CО2
MgCO3 + CO2 + H2O => Mg(HCO3)2
Mg(HCO3)2 = MgCO3↓ + CO2↑ + H2O
HNO₃
Mr(HNO₃) = 1+14+16·3 = 63
w(H) = 1/63 = 0,016 или 1,6%
w(N) = 14/63 =0,22 или 22,2%
w(O) = 16·3 /63 = 0,762 = 76,2%
Na₃PO₄
Mr(Na₃PO₄) = 23·3+31+16·4 = 164
w(Na) = 23·3/164 = 0,421 или 42,1%
w(P) = 31/164 = 0,189 или 18,9%
w(O) = 16·4 /164 = 0,390 = 39%