Homework Help: Chemistry

Posted by Anonymous on Monday, May 3, 2010 at 9:10pm.

If 1.88 g of copper(II) chloride dihydrate is reduced by Mg(s), what is the minimum mass of Mg(s) required for this reduction?

my work

CuMg --> Cu(s) + Mg
molecular weight= 170.482 CuCl2 . 2H2O
1.88/170.482 = 0.01103 mol CuCl2 . 2H2O
=0.01103 mol Mg

0.01103 * 24.31* 100 = 268 mg
is this correct?

Chemistry - DrBob222, Monday, May 3, 2010 at 9:30pm
Technically, no. The 0.268 is ok and it is grams. But placing mg outside makes it 0.269 milligrams which is not correct.
Chemistry - michele, Friday, September 14, 2012 at 5:09pm
What are the equations for 14C half life?

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