Given scientific fact as input, generate the question from this fact such that it can be answered from the input.

How much is involved in the reaction does the coefficient in front of an element in a formula indicate.
What does the coefficient in front of an element in a formula indicate?

You call materials able to conduct electricity with 100% efficiency, meaning that no energy is lost during the electrical transmission, superconductors.
What do you call materials able to conduct electricity with 100% efficiency, meaning that no energy is lost during the electrical transmission?

In the nuclear fusion process, two light nuclei combine to produce a heavier nucleus and great energy.
In which process do two light nuclei combine to produce a heavier nucleus and great energy?