m(CuSO4) = 100*16% = 16gFe + CuSO4 == FeSO4 + Cu56....160.............64m1....16g.............m256/m1 = 160/16 = 64/m2解得m1 = 5.6g,m2 = 6.4g所以铁钉质量比原来增加 = 6.4 - 5.6 = 0.8g所以称量得铁钉的质量为 50.8g
