In this equation what does n represent? eo=- g/nf

Find the mass in grams of 1.37x1020 particles of h3po4

Which part of earth’s surface receives the most direct rays from the sun? a) equator b) ocean c) poles d) mountains

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?