题目

根据图片选择正确的描述。【1】( )A.My little cat is on the sofa.B.My little cat is behind the sofa.【2】.( )A.Children like playing hide-­and­-seek.B.Children like playing table tennis.【3】( )A.Dad is watching TV in the living room.B.Dad is reading a book in the living room.【4】( )A.Amy is in the toilet.B.Amy is in the bedroom.【5】( )A.He found his shoes.B.He found his schoolbag.取等物质的量浓度的NaOH溶液两份，每份50mL．向其中分别通入一定量的CO2气体，随后各取溶液10mL，并分别加水稀释到100mL．分别向稀溶液后的溶液中逐滴加入0.1mol/L的盐酸，产生CO2气体的体积（标准状况）与所加入的盐酸的体积之间的关系如图（a）（b）所示．回答下列问题：（1）在（a）情况下，溶质为（写化学式）NaOH、Na2CO3NaOH、Na2CO3，其物质的量之比是1：11：1（2）在（b）情况下，溶质为（写化学式）NaHCO3、Na2CO3NaHCO3、Na2CO3，标准状况下，通入CO2气体的体积为0.56L0.56L．（3）原NaOH溶液中溶质的物质的量的浓度为0.75mol/L0.75mol/L．