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#### jsimpkins

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« on: October 16, 2011, 01:56:20 PM »
This came from a set of post lab questions.

Find the number of molecules  of benzene (C6H6) in a 34.00ml sample of benzene. The density of benzene is 0.880g/ml.

I'm a bit confused on where to start. C6H6 ----> 78.0g/mol

would I divide 78.0g/mol / 0.880g/ml = 88.6mol/ml?

Thanks in advance for any help.
Jim

#### Wald_ron

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« Reply #1 on: October 16, 2011, 02:57:31 PM »
This came from a set of post lab questions.

Find the number of molecules  of benzene (C6H6) in a 34.00ml sample of benzene. The density of benzene is 0.880g/ml.

I'm a bit confused on where to start. C6H6 ----> 78.0g/mol

would I divide 78.0g/mol / 0.880g/ml = 88.6mol/ml?

Thanks in advance for any help.
Jim

step 1: find the number of grams of benzene in a 34mL sample
step 2: find the number of mols of benzene in a 34mL sample
step 3: find the number of molecules
I've never seen a mole in a bag of animal crackers , but I've heard they're tasty. Can I have one please

#### Sanger

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