Air is about 78.0% nitrogen molecules and 21.0% oxygen molecules. Several other gases make up the remaining 1% of air molecules. Part A What is the partial pressure of nitrogen in air at atmospheric pressure (1 atm)? Assume ideal behavior. Express your answer to three significant figures and include the appropriate units. What is the partial pressure of oxygen in air at atmospheric pressure ( 1atm) ? Assume ideal behavior. Express your answer to three significant figures and include the appropriate units