设加水的质量为 x
20g/(20g+x)*100%=25%
x=60g
所得溶液为 20g+60g=80g
将20gNacl溶解多少克水中,就可配制成25%的Nacl溶液,所得溶液为多少克
将20gNacl溶解多少克水中,就可配制成25%的Nacl溶液,所得溶液为多少克
化学人气:819 ℃时间:2019-09-17 18:30:03
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