快啊,我要在10月5号之前知道啊
m(H2SO4)=m0*w(稀H2SO4)=500g*0.196=98(g)
V(H2SO4)=[m(H2SO4)/w(浓H2SO4)]/p(浓H2SO4)=98/.98/1.84=54.3(mL)