A:二氧化碳是形成酸雨的主要气体
B:一氧化碳含量增加会导致温室效应
C:金刚石、石墨都是碳单质,两者碳原子的排列方式相同
D:大气中二氧化碳的消耗途径主要是绿色植物的光合作用
It is Sunday tomorrow. We are going to watch a football game. It is between a Japanese team and a Chinese team. The football game will begin at 4:00 in the afternoon. Our teacher, Mr. Wang will watch the football game with us. We will go there by bus. We think we can come back at about 6:00 in the afternoon.
—On foot.
金属汞在加热条件下可以与氧气化合生成氧化汞,反应如下:2Hg +O2= 2HgO ,下列哪个选项可以说明0.2mol Hg 与0.2mol O2充分反应后物质的种类及其量的情况?( )