1/5单选题
难度：
1.一定质量的化合物与4.8 g氧气恰好完全反应， 只生成4.4 g二氧化碳和2.7g水。下列对该化合物元素组成的判断中，正确的是
| A | 只含有碳、氢两种元素 |
| B | 只含有碳、氧两种元素 |
| C | 只含有碳、氢、氧三种元素 |
| D | 含有碳、氢两种元素，可能含有氧元素 |
- 提示1：
- 5qC55o2u55Sf5oiQ54mp5Y+v5Lul5a6a5oCn5Yik5pat56Kz5YWD57Sg5ZKM5rCi5YWD57Sg77yM6ICM5rCn5YWD57Sg5piv5ZCm5a2Y5Zyo5YiZ6ZyA6KaB5a6a6YeP5YiG5p6Q44CC
- 提示2：
- 6Iul56Kz5YWD57Sg44CB5rCi5YWD57Sg44CB5Y+K5Y+C5Yqg5Y+N5bqU55qE5rCn5rCU55qE6LSo6YeP5oC75ZKM5bCP5LqO5pyA57uI5Lqn54mp55qE5oC76LSo6YeP77yM5YiZ6K+B5piO6K+l5YyW5ZCI54mp5Lit5LiA5a6a5ZCr5pyJ5rCn5YWD57Sg44CC
正确答案：Qw==
55Sx5LqO55Sf5oiQ5LqG5LqM5rCn5YyW56Kz77yM5Y+v5Yik5pat5Ye66K+l5YyW5ZCI54mp5Lit5LiA5a6a5ZCr56Kz5YWD57Sg77yb55Sx5LqO55Sf5oiQ5LqG5rC077yM5Y+v5Yik5pat5Ye66K+l5YyW5ZCI54mp5Lit5LiA5a6a5ZCr5rCi5YWD57Sg77ybPGJyPueUn+aIkOS6jOawp+WMlueis+S4reawp+WFg+e0oOeahOi0qOmHj+S4ujQuNGfDlzMyIC80NCA9My4yZ++8jOeUn+aIkOawtOS4reawp+WFg+e0oOeahOi0qOmHj+S4ujIuN2fDlzE2LzE4ID0yLjRn77yMMy4yZysyLjRnPTUuNmfvvJ40Ljhn77yM5Y+v5Yik5pat5Ye66K+l5YyW5ZCI54mp5Lit5LiA5a6a5ZCr5pyJ5rCn5YWD57Sg77ybPGJyPuaVhemAiUM=
2/5多选题
难度：
2.某物质 M在空气中完全燃烧时，生成质量比为22:9的CO2和H2O，则M的化学式可能是
| A | CH2O |
| B | CH3OH |
| C | C2H2 |
| D | C2H4 |
- 提示1：
- 5qC55o2u55Sf5oiQ5peg55qE6LSo6YeP5q+U5Y+v5Lul6K6h566X5Ye656Kz5Y6f5a2Q5LiO5rCi5Y6f5a2Q55qE5Liq5pWw5q+U
- 提示2：
- 6Iul5oOz6KaB5Yik5pat5piv5ZCm5a2Y5Zyo5rCn5YWD57Sg77yM6L+Y6ZyA6KaB5bey55+l5raI6ICX5rCn5rCU55qE6LSo6YeP77yM5omN6IO95bqU55So6LSo6YeP5a6I5oGS5a6a5b6L44CC5Zug5q2k5pys6aKY5Lit5LiN6IO956Gu5a6a6K+l54mp6LSoTeS4reaYr+WQpuWQq+acieawp+WFg+e0oOOAgumimOebruS4uuWkmumAiemimOOAgg==
正确答案：QSxE
5qC55o2u5Y+N5bqU5ZCO55Sf5oiQ5LqM5rCn5YyW56Kz5LiO5rC055qE6LSo6YeP5q+U5Y+v5Lul5YiG5Yir5rGC5Ye656Kz5YWD57Sg5LiO5rCi5YWD57Sg55qE6LSo6YeP5q+U77yaPGltZyB3aWR0aD0yMzAgaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvOTEvNTUvckJBQ0UxVUdsWDNBMkdqYkFBQUZ1SnBIdWdZMDY4LnBuZyI+77yb5Zug5q2k56Kz5Y6f5a2Q5LiO5rCi5Y6f5a2Q55qE5Liq5pWw5q+U5Li6MToy77ybPGJyPuS4jeiDveehruWumuaYr+WQpuWQq+acieawp+WFg+e0oOOAgg==
3/5单选题
难度：
3.点燃H2、O2和N2的混合气体20g，充分反应后生成18g水，则剩余的不可能是
| A | O2和N2的混合气体2g |
| B | H2和N2的混合气体2g |
| C | H2、O2和N2的混合气体2g |
| D | 2gN2 |
- 提示1：
- 5LqL5a6e5LiK5pys6aKY5Y+v5Lul55So5pyA566A5Y2V55qE5pa55rOV6YCJ5Ye6562U5qGI77ya5Y+N5bqU5ZCO5rCi5rCU5LiO5rCn5rCU6Iul5ZCM5pe25a2Y5Zyo77yM5Y+N5bqU5bqU5b2T57un57ut5Y+N5bqU44CC
正确答案：Qw==
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
4/5单选题
难度：
4.已知同温同压下，气体体积比等于分子数比．现有aLH2与CO的混合气体，完全燃烧后用去
LO2，则H2与CO混合气体中，两种气体的体积比是
LO2，则H2与CO混合气体中，两种气体的体积比是 | A | 2：1 |
| B | 1:1 |
| C | 1:2 |
| D | 任意比 |
- 提示1：
- 5pys6aKY6ZyA6KaB5qC55o2u5Y+N5bqU55qE5YyW5a2m5pa556iL5byP5bu656uL5Y+N5bqU54mp5YiG5a2Q5LiO5rCn5rCU5YiG5a2Q55qE5YWz57O744CC
- 提示2：
- 5peg6K665pivQ0/ov5jmmK9IPHN1Yj4yPC9zdWI+6YO95pivMuS4quWIhuWtkOa2iOiAlzHliIblrZDmsKfmsJQ=
正确答案：RA==
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
5/5单选题
难度：
5.将一定质量的CO和CO2的混合气体通入足量的石灰水中，充分反应后，生成的沉淀质量恰好等于原混合气体的质量，则原混合气体中CO和CO2的质量比为
| A | 14:11 |
| B | 11:14 |
| C | 7:11 |
| D | 11:7 |
- 提示1：
- 5pys6aKY5pyq55+l6YeP6L6D5aSa77yM6YeN54K55Zyo5LqO5aaC5L2V6K6+5pyq55+l5pWw44CC6K6+5Ye65pyq55+l5pWw5ZCO5LiA5a6a5qC55o2u5YyW5a2m5pa556iL5byP5Lit5LqM5rCn5YyW56Kz5LiO56Kz6YW46ZKZ55qE5YWz57O75p2l5YiX5pa556iL44CC5Zug5q2k5Lik6ICF55qE5a6e6ZmF6LSo6YeP5piv5LiA5a6a6KaB5YGH6K6+5Ye65p2l55qE44CC
- 提示2：
- 5oiR5Lus5Y+v5Lul5YGH6K6+5re35ZCI5rCU5L2T5LitQ0/nmoTotKjph4/kuLo8aT54PC9pPu+8jENPPHN1Yj4yPC9zdWI+55qE6LSo6YeP5Li6PGk+eTwvaT7vvIznorPphbjpkpnnmoTotKjph4/kuZ/kvr/lj6/ku6XooajnpLrlh7rmnaXkuobjgII=
正确答案：QQ==
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