标准状况下空气的密度为1.293g/L,现有标准状况下空气129.3g,其氧气的含量为()A.27.125g B.102.147g C.21L D.78L
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![标准状况下空气的密度为1.293g/L,现有标准状况下空气129.3g,其氧气的含量为()A.27.125g B.102.147g C.21L D.78L](/uploads/image/z/1458052-52-2.jpg?t=%E6%A0%87%E5%87%86%E7%8A%B6%E5%86%B5%E4%B8%8B%E7%A9%BA%E6%B0%94%E7%9A%84%E5%AF%86%E5%BA%A6%E4%B8%BA1.293g%2FL%2C%E7%8E%B0%E6%9C%89%E6%A0%87%E5%87%86%E7%8A%B6%E5%86%B5%E4%B8%8B%E7%A9%BA%E6%B0%94129.3g%2C%E5%85%B6%E6%B0%A7%E6%B0%94%E7%9A%84%E5%90%AB%E9%87%8F%E4%B8%BA%EF%BC%88%EF%BC%89A.27.125g+B.102.147g+C.21L+D.78L)
标准状况下空气的密度为1.293g/L,现有标准状况下空气129.3g,其氧气的含量为()A.27.125g B.102.147g C.21L D.78L
标准状况下空气的密度为1.293g/L,现有标准状况下空气129.3g,其氧气的含量为()
A.27.125g B.102.147g C.21L D.78L
标准状况下空气的密度为1.293g/L,现有标准状况下空气129.3g,其氧气的含量为()A.27.125g B.102.147g C.21L D.78L
c
v(空气)=129.3g/(1.293g/l)
=100l
在空气中氧气的含量是21%
所以V(O2)=100l*21%
=21l