Answer
See the answer below.
Work Step by Step
From the ideal gas law:
$P.V=n.R.T$
$n=1.5\ g\div 46.07\ g/mol=0.0326\ mol$
$P=0.0326\ mol×0.082057\ L.atm/mol.K×(250+273)\ K/(251\ cm^3×1\ L/1000\ cm^3)$
$P=5.57\ atm$
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.