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
冬季运动会
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 ...
一些您可能无法访问的结果已被隐去。
显示无法访问的结果
今日热点
Judge blocks Pentagon's plan
Trump revokes climate basis
Minnesota operation to end
6 killed in FL murder spree
Judge ends deportation case
Ends intelligence task force
Iowa settles citizenship suit
Iowa Lakes baseball bus crash
NBA suspends Brooks
Seattle to pay $29M
Russia blocks WhatsApp
'Harold and Maude' star dies
Trial date scheduled
Rejects DHS funding bill
Judge orders Wexner to testify
FBI releases new details
Announces concert tour
To undergo knee surgery
AI safety researcher quits
Mean Arms to pay $1.75M
4 states sue Trump admin
Trump on Netanyahu's pardon
DOJ antitrust chief quits
US home sales drop
Suspends Arizona gov. bid
Judge bars inmate transfer
Ukrainian star disqualified
Shooting suspect ID’d
To remain LA28 chairman
Gets engaged at Olympics
BYU football star arrested
Suspect extradited to NY
反馈