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搜题/搜资源
【单选题】【消耗次数:1】
将58.5gNaCl配成500mL溶液,其物质的量浓度( )mol/L。
①
3
②
2
③
1
④
0.5
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用40gNaOH配成2L溶液,其物质的量浓度( )mol/L。
①
0.5
②
3
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将在标准状况下,22.4LHCl配成0.5L盐酸,其物质的量浓度( )mol/L。
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①
10 ,1 ,0.1
②
1 ,1 ,1
③
2, 2, 2
④
100,10 ,1
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将2gNaOH固体溶于水配成250mL溶液,取出其中50mL,则这50mLNaOH溶液的物质的量浓度为( )。
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