An atom has 10 protons, ten neurons and ten electrons. what is the mass of that atom in u unit?

Asolution has a ca2+ concentration of 0.049 m and an f- concentration is 0.147 m at equilibrium. the value of ksp for caf2 at 25°c is 4.0 x 10-11. will this solution form a precipitate? yes no

If a reactant was removed, did the new equilibrium system shift to make more reactants or more products?

One similarity and one difference between an element and a mixture of elements