How many moles are in 163.5 liters of oxygen gas?

Write a net ionic equation to show that hydrofluoric acid, behaves as an acid in water.

What substance has a mass of 9.5g and volume of 2.1cm^3

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?