If a mixture of gasses contain 4.5 atmospheric O2 and 785mm Hg of N2 what is the total pressure of the mixture in atm

The total pressure of the mixture is 5, 53 atm.

Explanation:

The sum of the partial pressures of the gases that make up a gaseous mixture is equal to the total pressure of said mixture, according to Dalton's law. We convert the unit of pressure in mmHg into atm:

760 mmHg1 atm

785 mmHgx= (785 mmHgx 1 atm)/760 mmHg=1, 03 atm

P total= P 02 + P N2

P total= 4, 5 atm + 1,03 atm=5, 53 atm

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