What is the ratio of Lead (IV) Oxide (PbI2) to Sodium Oxide (Na2O) ?

0.66y = 0.9x + 0.48 if y has a value of 108.45 what is the value of x?

Which is the layer underground where all empty spaces are filled with a combination of air and water ?

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?