I NEED HELP

Think yall can lend me a hand with this assignment?

The isotonic saline solution described in part a is connected to an unknown solution via a semipermeable membrane, the unknown solution level drops. based on this information, what can be said about these two solutions?

If the atomic mass of an atom is 34 and the atom contains 13 protons, how many neutrons does the atom contain?

Reaction rate depends on how many molecules are coming into contact with each other with enough energy to react. increasing the temperature of the reactants will increase -