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15 April, 03:22

What is the mass of 1.70 moles of magnesium chloride, MgCl2?

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  1. 15 April, 03:32
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    162 grams First, look up the atomic weight of all involved elements Atomic weight Magnesium = 24.305 Atomic weight Chlorine = 35.453 Now, calculate the molar mass of MgCl2 24.305 + 2 * 35.453 = 95.211 g/mol Finally, multiply the molar mass by the number of moles 95.211 g/mol * 1.70 mol = 161.8587 g Rounding to 3 significant figures gives 162 grams.
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