These are pretty easy stoichiometry problems (links will be reported)

What must happen before a body cell can begin mitotic cell division

At 450 mm hg a gas has a volume of 760 l, what is its volume at standard pressure

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?