Our body needs iron. certain foods are rich in iron and iron tablets are usually recommended by doctors. but neither the food nor tablets are hard like iron? why?

What is impossible to do with a hypothesis

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?

Building glycogen from glucose molecules is an example of