Sulfur and oxygen gas combine to produce sulfur dioxide equation

For ai it's atomic number is 13 and it's mass number is 27 how many neutrons does it have

How many moles of air are there in a human lung with a volume of 2.4 l at stp? explain your answer

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)