Explain how burning coal to generate electricity is really just an energy conversion starting with solar energy from the sun and ending with turning on a light in your house.

Why is nh3 classified as a polar molecule

Which of the following words describe the reality that the universe looks the same from various perspective

What is a main difference between a mixture and a pure substance? a mixture is only a liquid, but a pure substance can be in any state.a mixture looks the same throughout, but a pure substance does not.1 a mixture can vary in composition, but a pure substance has a set composlo a mixture can be made up of a single compound, but a pure substance car