Respuesta :

Answer:

0.0074 moles

Explanation:

We'll have to use this forumla: PV = nRT

P = Pressure (0.724)

V = Volume in liters (0.25)

n = moles

R = 0.0821

T = temperature in kelvins (25 + 273 = 298)

Our equation will look like this:

(0.724)(.25) = n(0.0821)(298)

0.181 = 24.4658n

Divide both sides by 24.4658 to isolate n

0.181/24.4658 = 24.4658n/24.4658

n = 0.00739808