The total annual energy consumption in the U. S.A. is 1.00 x 10 20
joules. If you were capable of converting mass to energy with 100% efficiency, how much mass, in kg, would you need to produce an energy E = 1 x 10
20
joules?

What happens when light is scattered?

If a polyatomic ionic compound has gained two hydrogen ions, then how does its name begin?

Sally is making a model of a magnesium atom with an atomic mass number of 24 for her chemistry class. she has foam balls for the protons, neutrons, and electrons. she has added 6 neutrons to her model so far. how many more neutrons does she need to add to complete her neutral atom of magnesium?