How do you know the wave is a mechanical wave?

This is a mixture that has the same composition throughout.

Geothermal energy for industrial use is available almost anywhere. a.true b.false

Consider the reaction: n2(g) + o2(g) ⇄ 2no(g) kc = 0.10 at 2000oc starting with initial concentrations of 0.040 mol/l of n2 and 0.040 mol/l of o2, calculate the equilibrium concentration of no in mol/l how would this be done?