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共回答了16个问题采纳率:93.8% 举报
1.由2Na + 2H2O = 2NaOH + H2 得, n(NaOH)=n(Na)=46g/23g/mol=2mol,n(H2)=1/2n(Na)=1mol.
2.由Fe + 2HCl = FeCl2 + H2得, n(Fe)=n(H2)=4.48L/22.4L/mol=0.2mol,
故m(Fe) =56g/mol*0.2mol =11.2g; n(HCl)=2n(H2)=2*0.2mol=0.4mol,故V(HCL)=n(HCl)/c(HCl)=0.4mol/0.5mol/L=0.8L=800mL
1年前
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