Answer:
3.06 atm
Step-by-step explanation:
Using general gas law equation as follows:
PV = nRT
Where;
P = pressure (atm)
V = volume (litres)
n = number of moles (mol)
R = gas law constant (0.0821 Latm/molK
T = temperature (K)
According to the information provided in this question, V = 4L, T = 25°C = 25 + 273 = 298K, n = ?
Mass of He gas = 2.0g
Using mole = mass ÷ molar mass
Molar Mass of He = 4g/mol
mole = 2/4
mole = 0.5mol
Using PV = nRT
P = nRT/V
P = 0.5 × 0.0821 × 298 ÷ 4
P = 12.233 ÷ 4
P = 3.06 atm
Hence, the pressure inside the container is 3.06atm.