问题
选择题
448 mL 某气体在标准状况下的质量为1.28 g，该气体的摩尔质量约为
A．46 g
B．44
C．64 g/mol
D．32 g/mol
答案
答案：C
试题解析：448 mL 某气体在标准状况下的物质的量n="0.02" mol，M=" m" / n="1.28" g/0.02 mol="64" g/mol 。C，正确。64 g/mol
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448 mL 某气体在标准状况下的质量为1.28 g，该气体的摩尔质量约为
A．46 g
B．44
C．64 g/mol
D．32 g/mol
答案：C
试题解析：448 mL 某气体在标准状况下的物质的量n="0.02" mol，M=" m" / n="1.28" g/0.02 mol="64" g/mol 。C，正确。64 g/mol
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| It is Saturday morning. We don't go to 1 . Lily and Lucy go to 2 Uncle Wang this morning. The old 3 house is near the river. They can see some boats on the river. Uncle Wang is glad to meet the two girls. He 4 them some apples and pears. Now he is making a kite for 5 . His kites are good and the 6 like them. Lily and Lucy like 7 kites. Look, the kite is high in the sky now 8 they're very happy. They 9 Uncle Wang and go 10 with the kite. | ||||
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