A 5.00-L tank contains helium gas at 1.50 atm. What is the pressure of the gas in mm Hg?

Alright, so first of all, forget about the volume, as that information is irrelevant in this problem. To find the pressure in mmHg, remember that every one atmosphere is equal to 760 millimeters of Mercury. So, to convert, we multiply the pressure (1.5 atm) by 760 to find the new pressure in mmHg, which is 1140 mmHg.
1 atm = 760mmHg (760torr, 101.3kPa, 14.7psi or 1bar).
1.5atm = 1.5 x 760mmHg = 1,140mmHg.

(And this Mr. thumbs down, is a perfectly correct answer.
The method used to find it doesn't agree with you or you with it ?)

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