How to write 4 Carbon Monoxide molecules as a molecular formula?

Scientists discovered fossils in several layers of the earth you see here. they found fossils of algae, snails, and clams in layer d. given that information, where do you think they found fossil evidence of simple land plants and amphibians?

How many moles of sulfur dioxide are in 2.26 × 10^33 sulfur dioxide molecules?

Which of these have the same number of particles as 1 mole of water h2o