Calculate the pH of a solution with a [H3O+] concentration of 3.0 x 10-9 M.

Which statement about the stamps is correct?

What is the value of the standard enthalpy of formation of an element in its most stable form?

(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.