题型:问答题 简答题 一块表面被氧化的铝片质量为15.6g,将其放入烧杯中,加入213g稀硫酸,恰好完全反应,反应后,称得烧杯中的溶液质量为228g,求:(提示:Al2O3+3H2SO4═Al2(SO4)3+3H2O 2Al+3H2SO4═Al2(SO4)3+3H2↑)(1)生成氢气的质量为 g;(2)反应后所得溶液中溶质的质量分数. 查看答案
题型:问答题 简答题 Going to school by boat is more fun than _____.A. by bus B. by a bus C. taking a bus D. take a bus 查看答案