How many molecules are there in 2.3 grams of NH4SO2

Which of the following would be an accurate picture of the earth during the summer time of the northern hemisphere?

If i add water to oil what will happen

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.