Question

Question #79862

Answer 1

Using `PV = nRT`, the answer is .0259 moles.

Explanation:

You would use the equation `PV = nRT` (affectionately referred to as "piv-nert" by chemistry lovers)

where:
P is pressure
V is volume in liters
n is moles
R is the gas constant (its values vary depending on what unit of pressure you're using)
T is temperature in kelvin

In your case:
P = 735 mmHg
V = 660 mL = .660 L
n = ?
R = 62.4 `(L*mmHg)/(K*mol)`
T = 27 Celsius = 27 + 273 = 300 degrees kelvin

`(735)(.660) = (n)(62.4)(300)`

solve for n and the answer is .0259 moles.