Data:
P (pressure) = 30 atm
V (volume) = 100.0 L
T (temperature) = 295 K
n (number of mols) = ?
R (Gas constant) = 0.082 (atm*L/mol*K)
Formula:
[tex]p*V = n*R*T[/tex]
Solving:
[tex]p*V = n*R*T[/tex]
[tex]30*100.0 = n*0.082*295[/tex]
[tex]3000 = 24.19n[/tex]
[tex]24.19n = 3000[/tex]
[tex]n = \frac{3000}{24.19} [/tex]
[tex]\boxed{\boxed{n \approx 124.01\:mols}}\end{array}}\qquad\quad\checkmark[/tex]