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= 11,2 / 22,4
= 0,5 mol
--------------------------
mol = gram / Mr
--------------------------
Mr = gram / mol
= 21 / 0,5
= 42
Rumus Molekul :
(CH₂)n ----->Mr CH₂ = 14
n = 42 / 14
n = 3
Gas yang dimaksuda adalah :
= (CH₂)3
= C₃H₆