Question

Определите массовые доли всех элементов в следующих веществах: SO3, H2O,

NO2, CaCO3, Na2SO4, Zn(NO3)2, AlPO4, C6H12O6, CuSiO3, (NH4)2CO3.

Answer 1

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%