25℃时,有关物质的电离平衡常数如下: 化学式 CH3COOH H2CO3 H2SO3 电离平衡常数 K=1.8×10-5 K1=4.3×10-7K2=5.6×10-11 K1=1.5×10-2K2=1.02×10-7 (1)电解质由强至弱的
某海域海水一些化学成分如表: 海水成分 Na+ Ca2+ Mg2+ HCO3- Zn2+ 含量/mol•L-1 0.4 0.002 0.045 0.002 10-7 已知:25℃时,Ksp(CaCO3)=2.8×10-9、Ksp(MgCO3)=6.8×10-6,Ksp=1.8&
25×4-180÷6这题中的乘法和除法可以同时计算.___(判断对错) 下载作业帮APP学习辅导没烦恼 答案解析 结果1 举报 25×4-180÷6=100-30=70是同时计算乘法和除法,再算减法,原题说法正确.故答案为:√. APP内打开 热点考题 同步经典题专项精练 29615 基础·培优·进阶同步分层作业 16532 小学解题模型 21646 ...
6. How many times did you go to Hong Kong? —Only___ • 7. Hamburgers are not healthy food so I___ eat them. 8. It is raining harder than___ . 9. ― Docs your father often___ ? ―Yes. He often runs and plays volleyball. 10. Last...
SolarTech is a non-profit industry consortium dedicated to reducing the hidden soft costs and project cycle times 鈥 and expanding the market 鈥 for reside... PR Hernday - Solar Power International 被引量: 0发表: 2013年 研究点推荐 Solartech 站内活动 ...