lindarrr
Answered

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help pleaseee
find the molecular formula of a compound with a molar mass of 70.0 g/mol and an empirical formula of CH2.

Sagot :

chiiiiiiiiinu

Answer:

In order to find the molecular formula from an empirical formula you must find the ratio of their molecular masses.

We know that the molecular mass of the molecule is 70

gmol-1

. We can calculate the molar mass of

CH2

from the periodic table:

C=12.01

gmol−1

H=1.01

gmol−1

CH2 =14.03

gmol−1

Hence we can find the ratio:

14.03

70

≈

0.2

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