Определите массовые доли всех элементов в следующих веществах: SO3, H2O, NO2, CaCO3, Na2SO4, Zn(NO3)2, AlPO4, C6H12O6, CuSiO3, (NH4)2CO3.
Mr(SO3)=32+3*16=80 W(S)=32/80=0.4=40% W(O)=48/80=0.6=60% Mr(H2O)=2*1+16=18 W(H)=2/18=0.112=11.2% W(O)=16/18=0.888=88.8% Mr(NO2)=14+2*16=46 W(N)=14/46=0.305=30.5% W(O)=32/46=0.695=69.5% Mr(CaCO3)=40+12+3*16=100 W(Ca)=40/100=0.4=40% W(C)=12/100=0.12=12% W(O)=48/100=0.48=48% Mr(Na2SO4)=2*14+32+4*16=124 W(Na)=28/124=0.225=22.5% W(S)=32/124=0.258=25.8% W(O)=64/124=0.517=51.7%