An empirical formula of CH and a molar mass of 104 g / mol. What is the molecular formula?

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An empirical formula of CH and a molar mass of 104 g / mol. What is the molecular formula?

I am getting C12 H .... which is incorrect. The answer is C8 H8... can someone please show me why?

2007-10-23 07:42:20 · 2 answers · asked by Penmate 1 in Science & Mathematics ➔ Chemistry

2 answers

C=12
H=1
Total = 13
104/13 =8
so it would be C8H8 or 12*8=96 and 1*8=8
96+8=104

2007-10-23 07:52:58 · answer #1 · answered by Simonizer1218 7 · 0⤊ 0⤋

Taking an empirical mass for CH, which is 12 + 1 = 13g
So its molar mass of CH is 13g/mol
Dividing 104 g/mol by 13 g/mol = 8
This means that there are 8 carbons and 8 hydrogens in the molecular formula; C8H8

OK!!!!

2007-10-23 14:55:04 · answer #2 · answered by lenpol7 7 · 0⤊ 0⤋