Question

Please Help!
The volume of a sample of hydrogen is 798 mL and it exerts 621 mm Hg pressure at 5.00ºC. What volume does it occupy at standard temperature and pressure?

Answer 1

\[\frac{ P_1\times V_1 }{ T_1 } = \frac{ P_2 \times V_2 }{ T_2 }\]

P1 = 621 mm Hg - convert to atm
V1 = 798 mL - convert to L
T1 = 5.00ºC convert to Kelvin by adding 273 to the Celsius value

now they gave condition- standard temperature and pressure so:
P2 = 1 atm
T2 = 273 Kelvin
V2 = Unknown

so now you can put the values into this formula and get final answer

hope it helps :))