What happens when a star becomes a supernova?

Explanation:

Causes the expulsion of the outer layers of the star, filling the surrounding space with heavy elements. These remains form clouds of dust and gas, the explosion can reach other clouds of gas and dust nearby triggering the formation of a new nebula that originates after some time, new star systems, perhaps with planets.

b. latent learning (the word "latent" itself means something that exists but isn't obvious, only under certain conditions! )

answer: 802.3 kilo joules of energy represents 191.75 kilo calorie of energy.

explanation:

energy released during combustion of one mole methane = 802.3 kilo joules

if 1 kilo joule = 0.239006   kilo calorie

then ,802.3 kilo joule will be = 802.30.239006 kilo calorie

802.3 kilo joule = 191.75 kilo calorie

hence, the energy in kilo calorie is 191.75 kilo calorie.