Answer:
1.22 atm
Explanation:
Use the Ideal Gas Law, PV=nRT to solve. If you rearrange the equation to solve for P, you get P=nRT/v. Plug in the values to solve, like so:
P=(0.500)(0.0821)(298)/(10.0)
When solved, the equation gives you 1.22329. Round to three significant figures to get your answer of 1.22 atm.