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Chemistry

How many moles of water are in 4.50 grams of H2O?

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April 25, 2009 6:57PM

For this you need the atomic (molecular) mass of H2O. Take the number of grams and divide it by the atomic mass. Multiply by one mole for units to cancel. H2O=18.0 grams

4.50 grams H2O / (18.0 grams) =.25 moles H2O