1. The mass of the earth's atmosphere is approximately 5.151018kg. Assume that this corresponds to approximately 1.781020 moles of gas molecules. Our current estimate is that the carbon dioxide content of the atmosphere is about 420ppm, which means that for every million gas molecules in the atmosphere, approximately 420 of them are carbon dioxide. The carbon dioxide content of the atmosphere has been increasing about 2.2ppm each year for the past 15 years. For this homework problem I want you to make an estimate of the significance of the carbon footprint of the United States. a. Based on 420ppm, calculate the number of moles of carbon dioxide in the atmosphere. Then calculate the total number of grams of carbon dioxide in the atmosphere. b. Based on an increase of 2.2ppm annually, calculate the number of moles of carbon dioxide that are added to the atmosphere each year. Then calculate the total number of grams of carbon dioxide added to the atmosphere. c. Based on data from the EPA the USAA emitted 4715.7 million metric tons of carbon dioxide in 2020. How many grams of carbon dioxide does the United States add to the atmosphere each year? [Answer: 4.71571015 grams, or about 0.602ppm in the atmosphere.] d. Compare the US carbon dioxide emissions each year to the 420ppm total carbon dioxide in the atmosphere and the 2.2ppm increase in carbon dioxide each year. Write a short paragraph about the comparison and explain whether you feel the uS carbon emissions are significant or insignificant as far as building carbon dioxide in the atmosphere