Answer: for question 4, the answer would most likely be movement of air, water and rock
Explanation:
The potential energy is the water, through design and gravity the powerplant utilizes falling water, which then in turn uses mechanical energy through the turbines and generators to make electricity
I think there is 3 moles of carbon atoms in 3 moles of methane. This is so as the chemical formula for methane is CH4, which means that for every 1 mole of methane molecule you have 1 mole of carbon atom as in each molecule of methane there's one carbon atom.
I believe the answer is C. atomic structure and bonds.