A chemical reaction gives off 1,500 kj of heat energy. about how many calories is this?

We are asked to convert the amount of energy in units of kJ to units of calories. We need a conversion factor to multiply to the value given. From a conversion table, we will see that 1 kJ is equivalent to 0.24 calories.

1500 kJ (0.24 calories / 1 kJ) = 360 calories