Convert 0.00109 moles of photons absorbed in five minutes to moles of photons absorbed per second.

How many grams of oxygen gas are contained in a 15 l sample at 1.02 atm and 28°c? show your work.

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?

How many moles is 14.5 cm^3 of platinum? the density of platinum is 21.45 g/cm^3.