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April 19, 2014

April 19, 2014

Posted by **Anonymous** on Monday, January 23, 2012 at 1:32am.

- chemistry -
**DrBob222**, Monday, January 23, 2012 at 1:40pmI have news for you. CaCO3 is 40% by mass Ca and not 12.0%. (Actually 40.04%).

So if you want 1.2 g you would take

0.40x = 1.2 and x = 1.2/0.4 = 3.0 g CaCO3.

But your problem is worked the same way.

0.12x = 1.2 and x = 10 g. Check your figures. I can assure that CaCO3 is 40% Ca and not 12%.

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