Posted by stephanie on Friday, December 4, 2009 at 6:37pm.
It appears there are five calcium ions, one H, and 13 O, and three P per molecule. Now to get mole mass, you need to to find the atomic mass of each H, O, P, and Ca, then add all those (with the number of each). I get slightly higher than 500 grams/mole, so check against that.
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