1/5单选题
难度：
1.在化学反应2A+B2=2AB中，A 与B2反应的质量关系如右图所示，若6g A和8g B2充分反应，则生成AB的质量为
| A | 9g |
| B | 11g |
| C | 12g |
| D | 14g |
- 提示1：
- 5YiG5p6Q5Zu+5YOP5Y+v5Lul5b6X5Ye6QjxzdWI+Mjwvc3ViPuS4jkHlj43lupTnmoTotKjph4/mr5Q=
- 提示2：
- 5qC55o2u6LSo6YeP5a6I5oGS5a6a5b6L5Y+v5Lul6K6h566X5Ye65Y+N5bqU5ZCOQULnmoTotKjph4/jgII=
正确答案：Qw==
6YCa6L+H5Zu+5YOP5Y+v5Lul55yL5Ye65Y+C5Yqg5Y+N5bqUQeeahOi0qOmHj+S4um1n5pe277yMQjxzdWI+Mjwvc3ViPueahOi0qOmHj+S5n+S4um1n77yM55Sx5q2k55Sx5Lik6ICF5Y+N5bqU5pe255qE6LSo6YeP5q+U5pivMe+8mjHvvIw8YnI+5YiZ5Y+v5Yik5patNmdB5ZKMOGcgQjxzdWI+Mjwvc3ViPuWFheWIhuWPjeW6lOaXtiBCPHN1Yj4yPC9zdWI+5Lya5Ymp5L2ZMmfvvIw8YnI+6Lef5o2u6LSo6YeP5a6I5oGS5a6a5b6L5Y+v55+l55Sf5oiQ55qEQULkvJrmmK8xMmfvvI4=
2/5单选题
难度：
2.在反应M+2N＝R+2Q中，3.2gM与N恰好完全反应后，生成8.8gR，且反应生成的R和Q的质量比为11:9，则在此反应中N和Q的质量比是
| A | 16:11 |
| B | 16:9 |
| C | 9:16 |
| D | 4:9 |
- 提示1：
- 5pys6aKY6ICD5p+l5LqG5qC55o2u5YyW5a2m5Y+N5bqU6L+b6KGM566A5Y2V6K6h566X5Lul5Y+K6LSo6YeP5a6I5oGS5a6a5b6L44CC5rOo5oSP5Y+N5bqU5Lit55qE55u45a+55YiG5a2Q6LSo6YeP5Y+q5piv5LiA5Liq5Y+N5bqU55qE6LSo6YeP5q+U55qE5L2c55So77yM5Zug5q2k6Iul5bey55+l5Y+N5bqU55qE6LSo6YeP5q+U5L6L5Y+v5Lul55u05o6l5bqU55So44CC
- 提示2：
- 5qC55o2uUuWSjFHnmoTlj43lupTotKjph4/mr5Tku6Xlj4rlrp7pmYXnlJ/miJDnmoRS55qE6LSo6YeP77yM5Y+v5Lul5rGC5Ye65Y+N5bqU55Sf5oiQ55qEUeeahOi0qOmHj+OAgg==
- 提示3：
- 57un6ICM5Y+v5Lul5qC55o2u6LSo6YeP5a6I5oGS5a6a5b6L5rGC5Ye65Y+C5Yqg5Y+N5bqU55qETueahOi0qOmHj+OAgg==
正确答案：Qg==
PGltZyB3aWR0aD0xNDIgaGVpZ2h0PTcwIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvREMvQzIvckJBQ0ZGVUdscWV5cXptNkFBQUZJbi03bUtjNzIwLnBuZyI+PGJyPuWPjeW6lOeUn+aIkFHnmoTotKjph489Ny4yZ++8mzxicj7moLnmja7otKjph4/lrojmgZLlrprlvovvvIzlj4LliqDlj43lupTnmoRO55qE6LSo6YePPTguOGcrNy4yZy0zLjJnPTEyLjhn77ybPGJyPuWImeWcqOatpOWPjeW6lOS4re+8jOWPguWKoOWPjeW6lOeahE7kuI7nlJ/miJDnmoRR55qE6LSo6YeP5q+UPTEyLjhn77yaNy4yZz0xNu+8mjnvvI48YnI+5pWF6YCJQu+8jg==
3/5单选题
难度：
3.在反应A+3B===2C+3D中，C与D的相对分子质量比为22：9。若2.3 gA与足量B充分反应，生成2.7g D，则在此反应中，参加反应的B与生成C的质量比为
| A | 3：2 |
| B | 12：11 |
| C | 8：11 |
| D | 35：33 |
- 提示1：
- 5pys6aKY5LiA55u0Q+WSjETnm7jlr7nliIblrZDotKjph4/kuYvmr5TvvIzlj6/ku6XlgYforr7ku5bku6znmoTnm7jlr7nliIblrZDotKjph4/liIbliKvkuLoyMm7kuI45buOAguWboOS4uua2ieWPiueahOmDveaYr+avlOS+i++8jOS6i+WunuS4iuS5n+WPr+S7peWBh+iuvuWIhuWIq+S4ujIy5ZKMOS4=
- 提示2：
- 57un6ICM5qC55o2u5YyW5a2m5pa556iL5byP6L+b6KGM6K6h566X5Y2z5Y+v44CC
正确答案：Qg==
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
4/5单选题
难度：
4.在反应2A +B ===3C + D中，已知20克A与4克B恰好完全反应，生成6克D，则在此反应中B和C的质量比是
| A | 2：1 |
| B | 3：1 |
| C | 1：3 |
| D | 2：9 |
- 提示1：
- 5pys6aKY5Li76KaB6ICD5a+f6LSo6YeP5a6I5oGS5a6a5b6L44CC5Y+v5Lul55u05o6l5rGC5Ye65Y+N5bqU5ZCO55Sf5oiQ55qEQ+eahOi0qOmHj+OAgg==
正确答案：RA==
5pys6aKY6ICD5p+l55qE5piv6LSo6YeP5a6I5oGS5a6a5b6L5Y+K5YW25bqU55So77yM5bi46KeB5YyW5a2m5Y+N5bqU5Lit55qE6LSo6YeP5YWz57O744CCPGJyPuagueaNrui0qOmHj+WuiOaBkuWumuW+i++8jOe7k+WQiOmimOaEj+WPjeW6lDJBICsgQiA9PT0zQyArIETkuK3vvIzlt7Lnn6UyMOWFi0HkuI405YWLQuaBsOWlveWujOWFqOWPjeW6lO+8jOeUn+aIkDblhYtE77yM5YiZ5Y+v55+l5ZCM5pe255Sf5oiQQ+eahOi0qOmHj+S4ujIwKzTigJQ2PTE45YWL77yM5pWFQuOAgUPnmoTotKjph4/mr5TmmK8077yaMTg9Mjo5PGJyPuaVhemAiUQ=
5/5单选题
难度：
5.6.4g某物质R完全燃烧生成8.8gCO2，化学反应方程式是2R+3O2
2CO2+4H2O则由此得出的下列结论，完全正确的一组是①R由碳、氢两种元素组成②R中碳元素的质量分数是37.5% ③6.4gR燃烧还生成了7.2gH2O④R的相对分子质量等于64
2CO2+4H2O则由此得出的下列结论，完全正确的一组是①R由碳、氢两种元素组成②R中碳元素的质量分数是37.5% ③6.4gR燃烧还生成了7.2gH2O④R的相对分子质量等于64 | A | ①② |
| B | ③④ |
| C | ①④ |
| D | ②③ |
- 提示1：
- 5pys6aKY5Li76KaB6ICD5a+f5qC55o2u5YyW5a2m5pa556iL5byP55qE6K6h566X44CC5Y+q6KaB5o6M5o+h4oCc55+l5LiJ5rGC5LiA4oCd55qE5Y6f5YiZ5Y2z5Y+v44CC
正确答案：RA==
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