100g某硫酸恰好和13g锌完全反应.试计算这种硫酸中溶质的质量分数?
人气：477 ℃ 时间：2020-06-17 01:14:15
解答
Zn + H2SO4 = ZnSO4 + H2
65 98
13g x
x=19.6g
19.6g/100g=19.6%
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