What happens to nutrients in an organism when a decomposer consumes it

Avariable that is not being directly tested during an experiment should be

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)

Ill give u brainliest pls how is mass of carbon conserved during cellular respiration