English
全部
搜索
图片
视频
地图
资讯
Copilot
更多
购物
航班
旅游
笔记本
Top stories
Sports
U.S.
Local
World
Science
Technology
Entertainment
Business
More
Politics
时间不限
过去 1 小时
过去 24 小时
过去 7 天
过去 30 天
最佳匹配
最新
中国教育新闻网
15 年
Na2O2与H2O反应实验的改进
人教版高一化学教材(必修)第二章第二节“钠的化合物”中有这样一个实验:“过氧化钠与水反应”。通过向盛Na2O2粉末的试管中滴加水,用带火星的木条在试管口检验,木条复燃,表明生成了O2。再通过用脱脂棉包一定量的Na2O2粉末,用胶头滴管向棉花上滴2-3 ...
当前正在显示可能无法访问的结果。
隐藏无法访问的结果
今日热点
Nick Reiner pleads not guilty
US beats Canada in final
Chad shuts border w/ Sudan
US issues security alert
25 Mexican troops killed
India-US trade talks delayed
PreCheck still operational
BAFTAs host, BBC apologize
Hundreds protest in Verona
Merck creating cancer unit
NYC under travel ban
2 killed in Northlake fire
Dutch govt. sworn in
Nepal bus accident
CDC deputy director quits
Former Vikings DB dies
Major winter storm in US
ICC to hold pre-trial hearing
Re-elected to lead party
To buy US biotech Arcellx
Judge blocks Smith’s report
Bomb explosions in Ukraine
BAFTA Film Awards winners
Earthquake hits Malaysia
Former WNBA All-Star dies
Leaves game w/ back injury
HK court rejects appeal
Mugabe’s son charged in SA
To hear Exxon, Suncor bid
Retains heavyweight title
反馈