# Chem Urgent!

How do I determine the number of moles for the substance: 3.5 x 10^23 molecules H2O?

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1. 1 mol of anything has 6.02 x 10^23 molecules of (in this case) H2O. This must be close to a 0.5 mol but you need to do the exact arithmetic.

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2. How do I determine the number of grams for the following Substance? 7.8 mol ZnSo4.

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posted by Lisa
3. grams = mols x molar mass

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4. How do I determine the number of grams for the following Substance? 7.8 mol ZnSo4

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posted by Anymous

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