1)n=m/M выразим m=n*M=
=3.5*197=689.5г
2)M(H2SO4)=1*2+32+16*4=98г/моль
n=m/M=147/98=1.5моль
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1)n=m/M выразим m=n*M=
=3.5*197=689.5г
2)M(H2SO4)=1*2+32+16*4=98г/моль
n=m/M=147/98=1.5моль