挑战习题
1/5单选题
难度:

1.阿斯匹林(分子式为C9H8O4)是人们熟知的治感冒药,具有解热镇痛作用.它的摩尔质量是
A 148g
B 148g/mol
C 180g/mol
D 146g
提示1:
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正确答案:Qw==
6Zi/5pav5Yy55p6X77yI5YiG5a2Q5byP5Li6QzxzdWI+OTwvc3ViPkg8c3ViPjg8L3N1Yj5PPHN1Yj40PC9zdWI+77yJ55qE55u45a+55YiG5a2Q6LSo6YePPTEyw5c5KzgrMTbDlzQ9MTgwPGJyPuWboOatpOWug+eahOaRqeWwlOi0qOmHjz0xODBnL21vbOOAgg==