Respuesta :

kenmyna

The chemical reaction that gives off 2100 Kg of heat energy has 501.9126 calories


calculation

convert KJ to  calories

that is

          1 KJ  =  0.239006 calories

        2100KJ= ?  calories

by close multiplication

= (2100 kj  x 0.239006)÷ 1 kj  =501.9126 calories