Posted by angel on Thursday, July 14, 2011 at 4:56pm.
Do you know the mass of one (1) mole of MgCl2? That is 24.3 + 3*35.44 (approximately but you need to do it exactly). So 2 moles would be twice that, 3 moles would be 3x that, and 7080 moles would be -------that.
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