配套习题- 化学方程式的配平 -【青果学苑】

1/5单选题

难度：

1.2013年6月，我国拟用长征二号改进型火箭发射神舟十号载人飞船，火箭所用的燃料液态偏二甲肼（C₂H₈N₂）与N₂O₄发生的反应可写作：C₂H₈N₂+2N₂O₄═3N₂↑+2CO₂↑+nH₂O↑，则n等于

A	2
B	3
C	4
D	5

正确答案：Qw==

55Sx6aKY5oSP77yM54Gr566t5omA55So55qE54eD5paZ5ray5oCB5YGP5LqM55Sy6IK877yIQzxzdWI+Mjwvc3ViPkg8c3ViPjg8L3N1Yj5OPHN1Yj4yPC9zdWI+77yJ5LiOTjxzdWI+Mjwvc3ViPk88c3ViPjQ8L3N1Yj7lj5HnlJ/nmoTlj43lupTlj6/lhpnkvZzvvJpDPHN1Yj4yPC9zdWI+SDxzdWI+ODwvc3ViPk48c3ViPjI8L3N1Yj4rMk48c3ViPjI8L3N1Yj5PPHN1Yj40PC9zdWI+4pWQM048c3ViPjI8L3N1Yj7ihpErMkNPPHN1Yj4yPC9zdWI+4oaRK25IPHN1Yj4yPC9zdWI+T+KGke+8jOagueaNruWPjeW6lOWJjeWQjuawouWOn+WtkOeahOaVsOebruebuOetie+8jOWImTg9Mm7vvIxuPTTvvI48YnI+5pWF6YCJ77yaQ++8jg==

2/5单选题

难度：

2.配平8Al+3Fe₃O₄

XFe+4Al₂O₃反应式时，Fe前面的系数X应是

A	3
B	6
C	9
D	12

正确答案：Qw==

5qC55o2u5Y+N5bqU55qE5YyW5a2m5pa556iL5byPOEFsKzNGZTxzdWI+Mzwvc3ViPk88c3ViPjQ8L3N1Yj48aW1nIHdpZHRoPTUwIGhlaWdodD00MCBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwL0QwL0Q4L3JCQUNKbFpOZVRLRFlNc1hBQUFCLW9Qd2ZDSTYzNi5wbmciID5YRmUrNEFsPHN1Yj4yPC9zdWI+TzxzdWI+Mzwvc3ViPu+8jOWPjeW6lOWJjeWQjumTgeWOn+WtkOaVsOebruebuOetie+8jOWImTPDlzM9WCDvvJsgWD0577yO

3/5单选题

难度：

3.2013年4月，四川雅安发生了7.0级地震．震后灾区人民的饮用水可用漂白粉消毒．漂白粉的制取原理为：2Cl₂+xCa（OH）₂═CaCl₂+Ca（ClO）₂+2H₂O，此反应中x的数值为

A	1
B	2
C	3
D	4

正确答案：Qg==

6LSo6YeP5a6I5oGS5a6a5b6L77ya5Y+N5bqU5YmN5ZCO5ZCE5Y6f5a2Q55qE5pWw55uu5LiN5Y+Y77yM5Y+N5bqU5YmN5ZCO6ZKZ5Y6f5a2Q5Liq5pWw55u4562J77yM5YiZeD0xKzHvvIx4PTLvvI48YnI+5pWF6YCJQu+8jg==

4/5单选题

难度：

4.神州十号载人飞船发射时，其中的一个反应为：N₂H₄+2H₂O₂═N₂↑+x H₂O，式中x的值是

A	1
B	2
C	3
D	4

正确答案：RA==

55Sx5Y+N5bqU55qE5YyW5a2m5pa556iL5byP5piv77yaTjxzdWI+Mjwvc3ViPkg8c3ViPjQ8L3N1Yj4rMkg8c3ViPjI8L3N1Yj5PPHN1Yj4yPC9zdWI+4pWQTjxzdWI+Mjwvc3ViPuKGkSt4SDxzdWI+Mjwvc3ViPk/vvIznlLHlj43lupTliY3lkI7msKfljp/lrZDmlbDnm67nm7jnrYnvvIzliJkyw5cyPXjDlzHvvIx4PTTvvI48YnI+5pWF6YCJ77yaRO+8jg==

5/5单选题

难度：

5.化学方程式aC₂H₂+bO₂

cH₂O+dCO₂配平后a、b、c、d之和为

A	15
B	14
C	13
D	10

正确答案：Qw==

6aaW5YWI6YWN5bmz5YyW5a2m5pa556iL5byP77yaMkM8c3ViPjI8L3N1Yj5IPHN1Yj4yPC9zdWI+KzVPPHN1Yj4yPC9zdWI+PGltZyB3aWR0aD01MCBoZWlnaHQ9NDAgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC9EMC9EOC9yQkFDSmxaTmVTbURBM21nQUFBQi1BY1pMTW81NjkucG5nIiA+Mkg8c3ViPjI8L3N1Yj5PKzRDTzxzdWI+Mjwvc3ViPu+8jOWGjeaKiuWQhOezu+aVsOeahOWSjOWKoOi1t+adpe+8mjIrNSsyKzQ9MTPvvIzlm6DmraRB44CBQuOAgUTpgInpobnpg73plJnor6/vvI4=