把一块5克的铜锌合金放入足量的稀硫酸中,充分反应后,共收集氢气1.12升(氢气的密度为0.09克/升).求:(1)5克合金中锌的质量;(2)合金中铜的质量分数.
人气:305 ℃ 时间:2019-10-17 03:54:39
解答
铜锌合金放入足量的稀硫酸中只有Zn和稀硫酸反应放出氢气.
Zn+2H+=H2+Zn2+
氢气质量=1.12*0.09=0.1008g合0.0504mol
Zn即为0.0504mol合3.276g
:(1)5克合金中锌的质量3.276g
合金中铜的质量分数(5-3.276)/5*100%=34.48%
推荐
猜你喜欢
- 一个澡盆大致是长方体,长宽高分别是1.2m,0.5m,0.3m,它最多能装多少千克的水?
- 英语翻译
- The population of China is (1.3 billion).(划线提问,打括号的是划线处)
- 请帮我解释一下这些英语符号
- 有甲乙两个数,如果甲数增加他的25%,就与乙数相等,如果甲数增加他的50%,就比乙数多30.求甲数和乙数
- 根据句意及首字母提示补全单词My fanther likes Beijing Opera very much.He even wants to be a Beijing
- if i can make it there,i will make it anywhere.it's up to you.
- -Excuse me,Could you tell tell me the way ___ the nearest post office?- Walk along this street ___