Multiply the complex numbers and simplify them(5-2i)(6+3i)

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

Can someone me with questions 12 and 13 plz.

Which sentence about particles in matter is true? a. atoms are present in solids and liquids but not in gases. b. the particles of matter are in constant motion. c. the same kinds of atoms are found in different elements. d. when a solid changes to a liquid, the sizes of the particles change.