Can someone help me plz. chem/

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?

Particle model to predict what will happen if a sharp object creates a hole in the soccer ball

What is the molar mass of a gas that has density of 2.054 g/l