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December 20, 2014

Homework Help: chemistry

Posted by kyled on Tuesday, February 12, 2008 at 2:13pm.

The balanced reaction is
CaCO3 + 2 NaF -> CaF2 + Na2CO3
If you start with 20.0 grams CaCO3, how many moles of CaCO3 do you have?

20.0
2.00
.200
.0200
.0386


If you start with .500 moles of NaF, how many moles of CaF2 will form
.500
1.00
1.50
2.00
0.250


What is the sum of the coefficients (including 1) of the following reaction?
Sodium sulfate + calcium hydroxide ???

4
5
6
7
9


Predict the precipitate that forms: HCl + AgNO 3 ???
HNO3
HCl
AgNO3
AgCl
no precipitate forms

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