Could someone help with this please?

(04.05 hc) analyze the given diagram of the carbon cycle below. part 1: which compound does c represent? part 2: name a process that could release this compound into the air. part 3: explain how the elements that form it are conserved during the carbon cycle. use complete sentences to explain your answer. justify how this compound was created from a recycling of carbon in the carbon cycle. use complete sentences to explain your answer.

Which of these is an empirical formula? a) c2h4 b) c4h10 c) p2o5 d) p4o6

According to avogadro's law, what is characteristic of 1 mole of gas at stp?