4.
\(\rm{(1)}\)将\(\rm{11.2}\) \(\rm{L}\)\(\rm{(}\)标准状况\(\rm{)}\)乙烯和乙烷的混合气体通入足量溴水中,充分反应后,溴水的质量增加了\(\rm{5.6}\) \(\rm{g}\)。原气体混合物中乙烯与乙烷的物质的量之比为________
\(\rm{(2)}\)在一定温度下,\(\rm{10}\) \(\rm{mL}\) \(\rm{0.40}\) \(\rm{mol/L}\) \(\rm{H_{2}O_{2}}\)溶液发生催化分解,不同时刻测得生成\(\rm{O_{2}}\)的体积\(\rm{(}\)已折算为标准状况\(\rm{)}\)如下表。忽略溶液体积变化
\(\rm{t/min}\) | \(\rm{0}\) | \(\rm{2}\) | \(\rm{4}\) | \(\rm{6}\) | \(\rm{8}\) | \(\rm{10}\) |
\(\rm{V}\)\(\rm{(O_{2}}\)\(\rm{)/mL}\) | \(\rm{0.0}\) | \(\rm{9.6}\) | \(\rm{16.8}\) | \(\rm{22.4}\) | \(\rm{26.5}\) | \(\rm{29.9}\) |
\(\rm{(1).2 min}\)时\(\rm{H_{2}O_{2}}\)的浓度\(\rm{c(H_{2}O_{2})}\)_____________
\(\rm{(2).0~4 min}\)的平均反应速率\(\rm{v(H_{2}O_{2})}\)_____________
\(\rm{(3).0~10 min}\),过氧化氢的分解速率逐渐_____________\(\rm{(}\)填“加快”或者“减慢”\(\rm{)}\)
\(\rm{(4).}\)反应到\(\rm{6 min}\)时,\(\rm{H}\)\(\rm{{\,\!}_{2}}\)\(\rm{O}\)\(\rm{{\,\!}_{2}}\)分解率是_____________
\(\rm{(3)}\)某铝热剂由铁红和铝组成。取\(\rm{a}\) \(\rm{g}\)该铝热剂样品,向其中加入足量的\(\rm{NaOH}\)溶液,测得生成气体的体积为\(\rm{V_{1}}\) \(\rm{L(}\)标准状况,下同\(\rm{)}\)。另取\(\rm{a}\) \(\rm{g}\)该样品将其引燃,恰好完全反应,待反应产物冷却后,加入足量稀盐酸,测得生成气体的体积为\(\rm{V_{2}}\) \(\rm{L}\)。若不考虑空气中\(\rm{O_{2}}\)的影响,则\(\rm{V_{1}∶V_{2}}\)为____________