Which of the following solutions can act as a buffer? A) KCl/HCl, B) KHSO4/H2SO4, C) KNO2/HNO2. What does the pKa value mean and what does it tell you? Why is it important? Explain the buffer system used in buffered aspirin. For example, what is the chemical formula of the ...
While the potential $39bn acquisition of most of Anglo American by BHP was rejected, the deal immediately raised many questions. And given that the deal may reform at a higher price, or that AnglaAmerican might end up being bought by another suitor, it is worth examining these issues. The...
环境。他在教室后方的几张桌子上摆着矿泉水和饼干等“商品”，听课教师和学生分别扮演营业员和顾客，学生拿着事先准备好的“人民币”看商品标价、讲价及购买。课堂活泼生动，情境逼真，加深了学生对人民币和数用于生活的认识，同时也增强了他们的生活技能。 从教学内容与社会生活关系的角度分析，上述材料说...
但只有当这些男孩遭遇家庭、社交和学习成绩问题等压力时，不良行为才会出现。如一个年轻人无法同家人经常共同进餐，那么MAOA的2R变异基因就会激发他出现不良行为。但如果具有同样基因的人能和父母经常一起进餐，则有关风险就消失了。研究人员[u]称该研究可以扩展人类对违...
What does the term "chirality" mean? How did Mauveine impact our world economically and socially? What is a direct effect on humans that increases with the depletion of atmospheric ozone? What forces are opposing one another throughout the life of a star and how do they influence the various...
How did “way to go” come to mean “well done”? What is the situation when a contract is altered during transmission? Were US men and women ever so divided in national polls? Does “redeeming quality” simply mean “positive quality” today? While swimming, your speed is reduce...
Event 4674: "An operation was attempted on a privileged object" on Windows Server 2008 — what does it mean? Event 4776 Error Code: 0xC0000234 but account not actually locked out Event 528 / 538 Logon type 2 occurs on a 2003 server with no keyboard, monitor, mouse Event 6, Certificate...
So what does it mean, that Obama now nominated Sotomayor to sit on the U.S. Supreme Court? It means that any progress we've been making lately... WILL BE REVERSED. While Democrats in Congress have been making great strides in the gun rights arena, refusing to consider a renewal of the...
Event 4674: "An operation was attempted on a privileged object" on Windows Server 2008 — what does it mean? Event 4776 Error Code: 0xC0000234 but account not actually locked out Event 528 / 538 Logon type 2 occurs on a 2003 server with no keyboard, monitor, mouse Event 6, Certificate...
Event 4674: "An operation was attempted on a privileged object" on Windows Server 2008 — what does it mean? Event 4776 Error Code: 0xC0000234 but account not actually locked out Event 528 / 538 Logon type 2 occurs...