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CxHyOz
12u*x/1u = 38,7%/9,68%
x/y = 38,7/12*9,68 = 38,7/116,6 = 1/3
100% - 38,7 – 9,68 =51,62%
1u*x/16u*z = 9,68%/51,62%
x/z = 9,68*16/51,62 =154,88/51,62 =3/1
wzór elementarny CH₃O
CnH3nOn
12n + 3n + 16n = 62
31n = 62
n = 2
Wzór rzeczywisty C₂H₆O₂