Figure out the molecular formula when the elemental analysis is C, 79.37, H, 8.88, O, 11.75

Question

Robert · Accepted Answer

From the given data – 
9 12 1
C H O
79.37 8.88 11.75
Convert in to moles
79.37g 8.88g 11.75g
12g/mol 1.008g/mol 16.0g/mol
6.614mol 8.80mol = 0.734mol
Divideall results by0.734
6.614 8.80 0.734
9 12 1
0.734 0.734 0.734
Thus theformula of thecompound = C H O
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Figure out the molecular formula when the elemental analysis is C, 79.37, H, 8.88, O, 11.75

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