How much space does 2 x 1022 atoms of copper take up? How much space do 2 x 1022 copper pennies take up, using examples from the animation?

Plz choose one of the compounds from the table and explain how you know the numbers of atoms in your formula. is it possible for two different compounds to be made from the exact same two elements? why or why not? with a limited number of elements (less than 120 are known), does this mean we also have a small number of compounds or do we have a large number of compounds in this world?

Word equation for k(s) +h2o(l) yield koh (aq) + h2

How are evaporation and sublimation similar? a both involve the formation of a gas. b both release energy to the surroundings. c both take place throughout a solid. d both take place at the surface of a liquid.