Please help I never payed attention

How many miles of water are produced if 5.43 mol pbo2 are consumed

Which statement best explains the relationship between an area is geography and the temperature of its surface water

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?