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%S=22,5%
%O=45,1%(Przy zalozeniu mr=100g)
wiec:
mNa=32,4g, MNa=23g/mol
mS=22,5g, MS=32g/mol
mO=45,1g, MO=16g/mol
nNa=32,4/23=1,4mol
nS=22,5/32=0,7mol
nO=45,1/16=2,8mol
nNa:nS:nO
1,4:0,7:2,8
2:1:4
Na2SO4-siarczan(VI) sodu