if energy can't be created or destroyed, then it means there must have been a certain amount of energy when the universe was born, right? Is it possible to measure how much energy there was in the beginning?

the answer is c don't question i took the test

First Law of Thermodynamics: Energy can be changed from one form to another, but it cannot be created or destroyed. ... The First Law of Thermodynamics (Conservation) states that energy is always conserved, it cannot be created or destroyed. In essence, energy can be converted from one form into another.

Explanation:

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.