1a. calculate the relative formula mass of magnesium oxide when the relative atomic masses are O=16 Mg=24 1b. calculate the percentage by mass of magnesium in magnesium oxide​

Nitrogen dioxide decomposes according to the reaction 2 no2(g) ⇌ 2 no(g) + o2(g) where kp = 4.48 × 10−13 at a certain temperature. if 0.70 atm of no2 is added to a container and allowed to come to equilibrium, what are the equilibrium partial pressures of no(g) and o2(g)