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Your electric bill for 1500 kilowatt-hours is a charge for the power you have used that month.

A scheme of thought that has survived a test of detailed examination for long periods of time is a

The breaking and making of chemical bonds explains chemical reactions and energy flow.

In the evening sky, the Sun appears reddish as it sets because

When balancing a chemical equation, you need to change subscripts to make the number of atoms of an element the same on both sides of the equation.

What is the correct name for the ionic compound, CaF?

Imagine an experiment in which an 8-lb bowling ball and a heavier 10-lb bowling ball are dropped from a building’s sixth-floor window at the same time. The heavier ball will be observed to reach the ground first.

During chemical reactions, atoms are

When chlorinated water reacts with other solvents, the resulting compounds can cause

The north end of a suspended magnet will point to Earth’s magnetic north pole.