Дано
W(H2SO4)=15%
NaOH
m(Na2SO4)=270 g
-----------------
m(H2SO4)-?
m(NaOH)-?
Y X 270
2NaOH+H2SO4-->Na2SO4+2H2O
2* 40 98 142
M(NaOH)=40 g/mol
M(H2SO4)=98 g/mol
M(Na2SO4)=142 g/mol
X=98*270 / 142
X=186.34 g
m(ppaH2SO4)=186.34 * 100% / 15%=548.06 g
Y(NaOH)=80*270 / 142
Y(NaOH)=152.11 g
ответ 548.06 г, 152.11 г