问题
填空题
(7分)写出铜与稀硝酸反应的化学方程式,用单线桥标出电子转移情况
该反应的氧化剂 ,还原剂 ,氧化剂和还原剂物质的量之比为 。
答案
(7分)
(方程式2分,电子转移2分)
氧化剂 HNO3 ,还原剂 Cu ,氧化剂和还原剂物质的量之比为 2:3 。(每空1分)
(7分)写出铜与稀硝酸反应的化学方程式,用单线桥标出电子转移情况
该反应的氧化剂 ,还原剂 ,氧化剂和还原剂物质的量之比为 。
(7分)
(方程式2分,电子转移2分)
氧化剂 HNO3 ,还原剂 Cu ,氧化剂和还原剂物质的量之比为 2:3 。(每空1分)
阅读理解。 | |
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1. Mrs. Yang wants _____ for her daughter. | |
[ ] | |
A. a babysitter B. a good graduate C. an English tutor | |
2. If you are the tutor, you must teach the daughter for _____ on Saturday. | |
[ ] | |
A. a day B. two hours C. three hours | |
3. What is not a part of the job? | |
[ ] | |
A. Cooking for the kids. B. Working at the kid's house. C. Being good with the kid. | |
4. If (如果) you want to be the tutor, you need to _____. ① be beautiful ② have three years' teaching experience ③ have time on weekends ④ be a woman teacher | |
[ ] | |
A. ①② B. ②③ C. ②③④ | |
5. Which is NOT true? | |
[ ] | |
A. The tutor can get $360,if she teaches the kid for two weekends. B. The kid is good at English. C. The tutor can speak English. |