What is the balanced equation for: mg(no3)2 + k3po4 > mg3(po4)2 + kno3?

Can someone me with 1 to 4 plz. fast

Which of the following are correct values for the ideal gas laws constant r

Amixture initially contains a, b, and c in the following concentrations: [a] = 0.300 m , [b] = 1.05 m , and [c] = 0.550 m . the following reaction occurs and equilibrium is established: a+2b⇌c at equilibrium, [a] = 0.140 m and [c] = 0.710 m . calculate the value of the equilibrium constant, kc.