利用下面四种途径都可以得到氧气：写出实验室中通过甲、乙两种途径制取氧气的化学方程式：甲_1；乙_2化学实验的绿色化就是以绿色化学的理念和原则来指导实验。从实现原料和反应过程的绿色化考虑，你认为在中学实

题干

利用下面四种途径都可以得到氧气：

写出实验室中通过甲、乙两种途径制取氧气的化学方程式：

甲____；乙____

化学实验的绿色化就是以绿色化学的理念和原则来指导实验。从实现原料和反应过程的绿色化考虑，你认为在中学实验室里，甲、乙、丙三种制取氧气的途径中，____（选填“甲”、“乙”或“丙”）途径更体现化学实验的绿色化追求。

上一题下一题 0.0难度选择题更新时间:2017-10-27 11:00:49

答案(点此获取答案解析）

2H₂O₂

\underline{M n O_{2}}

同类题5

watch learn be have Chinese
Dick and Ellen come from America. Now they ____ in Tianjin. Every morning they get up very early. Then they go to work by car. They start their work at 8:30. They are very busy. They ____ lunch at 12:30. After lunch they work again. They finish their work at 5:30 p.m. In the evening Dick takes Chinese lessons because he wants ____ Chinese. Ellen stays at home and ____ TV. They like to talk with Chinese people. They often say "Chinese people are very friendly". They like to stay in ____ and they like to work with Chinese people.

题干

答案(点此获取答案解析）

同类题1

同类题2

同类题3

同类题4

同类题5