A sample of neon at 25C occupies a volume of 500. L at 2.00 atm. How many moles of neon are present?

A sample of neon at 25°C occupies a volume of 500. L at 2.00 atm. How many moles of neon are present? Provide an answer correct to 2 significant figures in moles. For example, if you calculate that the correct answer is 514 moles, simply type "510" in the box without the quotation marks (") or units as part of your answer.