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幼苗
共回答了31个问题采纳率:77.4% 举报
1
Fe + 2HCl = FeCl2 + H2
56.128.2
5.6.x.y
溶质质量x=12.8g
溶剂质量 = 5.6+30-(12.8+y) =35.6-(12.8+0.2) = 22.6g
2.
Na2CO3 + 2HCl = 2NaCl + H2O + CO2
106.117.44
10.6.x.y
x=11.7g; y=4.4g
溶质质量=11.7g
溶剂质量 = 10.6+120 -(11.7+4.4) = 114.5g
3.
Zn + H2SO4 = ZnSO4 + H2
65.161.2
6.5.x.y
x=16.1g; y=0.2g
溶质质量=16.1g
溶剂质量= 6.5+20 -(16.1+0.2) = 10.2g
4.
CaCO3 + 2HCl = CaCl2 + CO2 + H2O
100.111.44
10.x.y
x=11.1g; y=4.4g
溶质质量=11.1g
溶剂质量 = 10+90 -(11.1+4.4) = 84.5g
1年前
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