【单选题】Does the paragraph explain why the solutions are good or bad?
【单选题】强酸和强碱的稀溶液的中和热可表示为:H + (aq)+OH - (aq)=H 2 O(1) △H = -57.3kJ/mol 已知:CH 3 COOH(aq)+NaOH(aq)=CH 3 COONa(aq)+H 2 O(1) △H ='-' Q 1 kJ/mol 1/2 H 2 SO 4 (aq) + NaOH(aq) ='=' 1/2Na 2 SO 4 (a...
【单选题】强酸和强碱的稀溶液的中和热可表示为: H + (aq)+OH - (aq)==H 2 O(1) △H =-57.3kJ/mol 已知: CH 3 COOH(aq)+NaOH(aq)==CH 3 COONa(aq)+H 2 O △H =- Q1kJ/mol 1/2H 2 SO 4 (浓) + NaOH(aq) ==1/2Na 2 SO 4 (aq) +H 2 O(1) △H =- Q2kJ/mol ...
【单选题】Why does the woman call the man?
A.
To ask about his decision.
B.
To give him some work details.
C.
To tell him to have a job interview.
【单选题】强酸和强碱在稀溶液中的中和热可表示为:H + (aq)+OH - (aq)=H 2 O(l);△H=' -57.3k' kJ·mol - 1 , 又知在溶液中反应有:CH 3 COOH(aq)+NaOH(aq)=CH 3 COONa(aq)+H 2 O(l) ;△H= -Q 1 kJ·mol - 1 H 2 SO 4 (aq)+NaOH(aq)= Na 2 SO 4 (aq)+H 2 O(l) ;...
【单选题】强酸与强碱的稀溶液发生中和反应时,中和热的热化学方程式可表示为: H + (aq)+OH - (aq)══ H 2 O(l) ΔH='-57.3' kJ·mol -1 。有以下4个化学方程式: ①H 2 SO 4 (aq)+2NaOH(aq)══ Na 2 SO 4 (aq)+2H 2 O(l) ②H 2 SO 4 (aq)+Ba(OH) 2 (aq)══ BaSO 4 (s)+2H 2 O(l)...
【单选题】强酸和强碱的稀溶液中和热可表示为:H + (aq)+OH - (aq)═H 2 O(l)△H=-57.3kJ/mol以下4个热化学方程式中, ①H 2 SO 4 (aq)+2NaOH(aq)=Na 2 SO 4 (aq)+2H 2 O(l) ②H 2 SO 4 (aq)+Ba(OH) 2 (aq)=BaSO 4 (s)+2H 2 O(l) ③NH 3 ?H 2 O(aq)+HCl(aq)=NH 4...
【单选题】Why does the man talk to the woman?
A.
To have a driving lesson.
C.
To get a train ticket.
【单选题】强酸和强碱稀溶液的中和热可表示为: H + (aq)+OH - (aq)=H 2 O(l) △H=-57.3 kJ·mol -1 已知: CH 3 COOH( aq)+NaOH( aq) =CH 3 COONa(aq)+ H 2 O(l) △H1 H 2 SO 4 (浓)+NaOH(aq)=Na 2 SO 4 (aq)+H 2 O(l) △H2 HNO 3 ( aq)+ KOH( aq)=KNO ...
【判断题】机场通常离市区较远、可达性差,且人流量小,因此其景观简单设计即可。