Which is the right answer?

How does the principle of electromagnetism explain the interaction between earth’s magnetic field and the solar wind?

How would the number of moles (n) of o2 change if the atmospheric pressure doubled but all other variables stayed the same

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.