# Problem: How many moles of Ar are contained in a 5.00 L tank at 155°C and 2.80 atm? A) 0.399 moles B) 0.455 moles C) 1.10 moles D) 2.51 moles E) 0.289 moles

###### FREE Expert Solution

Calculate the number of moles of gas present in the container using the ideal gas equation.

$\overline{){\mathbf{PV}}{\mathbf{=}}{\mathbf{nRT}}}$

P = pressure, atm
V = volume, L
n = moles, mol
R = gas constant = 0.08206 (L·atm)/(mol·K)
T = temperature, K

91% (367 ratings) ###### Problem Details

How many moles of Ar are contained in a 5.00 L tank at 155°C and 2.80 atm?

A) 0.399 moles

B) 0.455 moles

C) 1.10 moles

D) 2.51 moles

E) 0.289 moles

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the The Ideal Gas Law concept. You can view video lessons to learn The Ideal Gas Law. Or if you need more The Ideal Gas Law practice, you can also practice The Ideal Gas Law practice problems.