The half-life of 131i is 8.021 days. what fraction of a sample of 131i remains after 24.063 days

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?

If a gas has an initial pressure of 101kpa and a volume of 10l, then it expands to a volume of 20l, what is the new pressure?

Which type of intermolecular attractions holds ammonia molecules together with other ammonia molecules?