What pressure will be required to contain 0.5 moles of SO2 gas in a 25.0 L container at a temperature of 100. C

0.612 atm

Explanation:

Use the Universal Gas Law:

PV = nrT

Where P is pressure, V is volume, n is the number of moles, r is the universal gas constant, and T is temperature in K.

Plug in your given values:

(P)(25.0) = (0.5)(0.0821)(373)

Solve for P:

P = 0.612466

--> Round to sigfig:

P = 0.612

* The universal gas constant I used was Latm/molK. If the answer needs to be in Kpa or Torr, you would need to convert it again.

Hope this helps!