问题 选择题

用NA表示阿佛加德罗常数,下列说法正确的是(  )

A.22.4L O2的物质的量约为1mol

B.标准状况下,11.2L H2O的物质的量约为9g

C.1 L  1mol/L的NaOH溶液中Na+的物质的量为1 mol

D.0.1mol铁与足量的盐酸完全反应,铁失去的电子数为0.1NA

答案

A、温度压强不知,22.4L O2的物质的量不一定为1mol,故A错误;

B、标准状况水不是气体,11.2L H2O的物质的量不是0.5mol,故B错误;

C、依据n=cV计算,1 L 1mol/L的NaOH溶液中含氢氧化钠物质的量1mol,含Na+的物质的量为1 mol,故C正确;

D、0.1mol铁与足量的盐酸完全反应,生成氯化亚铁,铁失去的电子数为0.2NA,故D错误;

故选C.

完形填空

A green life sometimes just needs a good idea like sharing cars.It’s a new way of thinking.You can use a car but you don’t need to own it Now the idea of “car sharing” has become       in many countries.

As we know ,most cars       in garages for much time.In fact,we drive our own cars          one or two hours a day on average(平均).    When we don’t use them,we have to pay for parking and        things.That costs too much money.To       money,some people come up with the idea of “car sharing”.If we share a car, we’ll only        when we use it.

Now many people are starting to do car sharing.In Switzerland,almost 40,000 people have          it.Japan is also trying to make       popular around the country.

Car sharing is the beginning of a new idea in      .It is also very nice for us to travel everywhere    buying a car.Do you love to share a car with others?                                                                         

小题1:A.popular            B.interesting         C.funny          

小题2:A.are washed         B.are driven         C.are parked      

小题3:A.as far as            B.as long as          C.as much as      

小题4:A.the other           B.others             C.other        

小题5:A.make              B.save              C.find            

小题6:A.spend              B.cost              C.pay

小题7:A.joined             B.covered            C.take part

小题8:A.time saving         B.money saving       C.car sharing   

小题9:A.fashion           B.transportation       C. the world

小题10:A.without          B.with              C.by 

单项选择题