【判断题】已知反应 2 A (g) + B (g) → C (g) 为基元反应,若将 2 mol A (g) 物质和 1 mol B (g) 物质放在 1 升容器中反应,则开始反应的速率将是 A 和 B 都消耗一半时速率的4 倍。
【单选题】汤类、炖品或高档宴会的分菜方式适宜采用( )。
【简答题】已知反应 A(g) + B(g) → C(g)+H 2 O(l) 在 298.15K 时的恒容摩尔反应热为 100kJ · mol - 1 ,则在同温下该反应的恒压反应热 Q p = 。
【单选题】已知反应3A+2B→2C+D,A、B两物质完全反应时的质量比为3:4,若生成C和D共140g,则反应消耗B的质量是( )
【单选题】Anger is a normal emotion that we all feel from time to time. Some people express anger openly in a calm reasonable way. Some explode with anger, and scream and shout. But other people keep their ange...
A.
say nothing no matter how angry you are
B.
express anger openly and freely right away
C.
express your anger immediately but calmly
D.
think about whether it’s worth getting angry
【单选题】violent or uncontrollable anger