What trend in atomic radius do you see as you go down a group on the periodic table

Someone, 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.

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation:

Avariable that is not being directly tested during an experiment should be changed varied experimented controlled