A.d/400mol/L | B.20/d mol/L | C.2.5d mol/L | D.1.25 mol/L |
1g |
40g/mol |
20g |
1000dg/L |
1 |
50d |
0.05mol | ||
|
A.0.1 mol/L | B.1.5 mol/L | C.0.25 mol/L | D.0.5 mol/L |
A.1 L水中溶解了58.5 g NaCl,该溶液的物质的量浓度为1 mol•L-1 |
B.从1 L 2 mol•L-1的H2SO4溶液中取出0.5 L,该溶液的浓度为1 mol•L-1 |
C.配制500 mL 0.5 mol•L-1的CuSO4溶液,需62.5 g胆矾 |
D.中和100 mL 1 mol•L-1的H2SO4溶液,需NaOH 4 g |
A.500mL溶液中NO3-物质的量为0.2NA |
B.500mL溶液中NO3-离子浓度为0.4mol/L |
C.500mL溶液中Ba2+离子浓度为0.2mol/L |
D.1L溶液中阴、阳离子总数为0.8NA |
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