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Topic: Molecular weight of this compound is ?  (Read 973 times)

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Offline Fish200398

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Molecular weight of this compound is ?
« on: November 13, 2019, 03:40:50 AM »
A 12mg monocarboxylic acid contain only C H O, burned and resulted in 17.6   CO2 7.20 mg H2O
I found that weight of C is 4.8 mg  H2 is 0.8 mg and O 6.4 mg
I get the compound is CH2O
But the molecular weight isnt 30, the answer isnt 30. Why?
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Offline AWK

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Re: Molecular weight of this compound is ?
« Reply #1 on: November 13, 2019, 04:18:06 AM »
Organic acid should contain at least 2 oxygen atoms (-COOH).
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AWK

Offline Fish200398

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Re: Molecular weight of this compound is ?
« Reply #2 on: November 13, 2019, 04:27:40 AM »
But why the compound i found is ch2o?
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Offline mjc123

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Re: Molecular weight of this compound is ?
« Reply #3 on: November 13, 2019, 04:32:06 AM »
Look up "empirical formula" and "molecular formula"
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Offline Fish200398

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Re: Molecular weight of this compound is ?
« Reply #4 on: November 13, 2019, 04:59:17 AM »
Ok thanks all
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