The combustion of 14 grams of co according to the reaction co(g) + ½o2(g) co2(g) + 67.6 kcal gives off how much heat?

remember to use significant digit rules.

6,716 kcal
1,514 kcal
34 kcal
135 kcal
none of the above

First thing to do is to calculate the amount in moles CO used for the combustion process. Then, we use the data from the reaction to determine the amount of heat released by that amount. We calculate as follows:

14 g ( 1 mol / 28.01 g ) = 0.50 mol CO

0.50 mol CO ( 67.6 kcal / 1 mol CO ) = 33.79 kcal 

Therefore, the closest from the choices listed is the third option.

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