A burning match releases 838.2 J of energy. Convert the energy released by 20 matches to the following energy units: (provide an answer in 4 significant figures) Kilojoules
Calories
Food Calories
calories
kcal

See explanation

Explanation:

In this case, we can start with the calculation of the total energy released by the 20 matches. One match release 838.2 J of energy ( 1 match = 838.2 J). So:

With this in mind, we have to find al the conversion ratios to "Jolues", so:

Now, we can do the conversions:

I hope it helps!