Which statement must be true when solution equilibrium occurs?
(1) the solution is at stp.
(2) the solution is supersaturated.
(3) the concentration of the solution remains constant.
(4) the masses of the dissolved solute

What substance has a mass of 9.5g and volume of 2.1cm^3

Suppose that some of the compound spilled out of the crucible after it was heated. would that cause the percent by mass of water in the compound determined by the experiment to be too low, too high, or unchanged? briefly explain your answer.

An atomic nucleus is composed ofa)protons.b)protons and neutrons.c)protons and electrons.d)protons, neutrons, and electrons.