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April 17, 2014

Homework Help: Chemistry

Posted by Mitch on Monday, November 19, 2012 at 1:44am.

In an experiment, 0.0300 moles each of SO3(g), S02(g), and O2(g) were placed in a 10.0L flask at a certain temperature. When the reaction came to equilibrium, the cocentration of SO2(g) in the flask was 3.50x10^-5 molar. What is Kc for the reaction? 2SO2(g) + O2(g) <--> 2SO3(g)
a. 3.5x10^-5
b. 1.9x10^7
c. 5.2x10^-8
d. 1.2X10^-9
e. 8.2x10^8

The answer is B but i am not sure why

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