Answers

(1)2:5=4:x
(2)2:4なので、二酸化炭素は4モル 体積は22.4☓( )L
(3)2:2なので、水は0.25モル 6.02☓10^23☓(   )個
(4)2:4なので、二酸化炭素は0.2モル 二酸化炭素1モルは44gなので
(5)2:4なので、二酸化炭素は20L

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