Is a table sugar a pure substance

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.

Need on both questionswill markbr />

When a device is used in a circuit in which the voltage is 81 v the current flowing through the device is 3 a what is the resistance of the device