To pass an emissions test, your car cannot emit more than 1,000 ppm carbon monoxide (CO). Your car produced 3.2 grams of CO in 67.2 liters of exhaust. Show the calculations necessary to decide if your car passed or failed the emissions test. (note: 22.4 liters of air/mole and 31 grams/mole of air).

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since the atomic number is the number of protons in the nucleus, as we move to the left on the periodic table, the electrostatic pull between the nucleus and the valence electron shell decreases. as we move down a group (vertical column), the valence shell energy level gets further and further from the nucleus.