Based upon elemental analysis, the empirical formula for an unknown compound was calculated to be CH2. Mass spectrometry analysi
s reveals the compound to have a molar mass of approximately 42 g/mol. What is the molecular formula for the compound
2 answers:
Answer:
C3H6
Explanation:
42g/mol=molar mass
14g/mol= emperical mass
42/14=3
3 times emperical
Answer:
C3H6
Explanation:
We can obtain the molecular formula by using the empirical formula and the molar mass in combination.
This is shown below:
[CH2]n = 42g/mol
We then add the atomic masses of carbon and hydrogen and multiply by n to give the value of n .
n[12 + 2(1)] = 42
14n = 42
n = 42/14 = 3
The molecular formula is thus [CH2]3 = C3H6
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