Answer:
4.93 moles
Step-by-step explanation:
To find how many moles of gas pressure occupy 58 L at a pressure of 1.55 atmospheres and a temperature of 222 K, use the ideal gas law.
Ideal Gas Law

where:
- P is the pressure measured in atmospheres (atm).
- V is the volume measured in liters (L).
- n is the number of moles.
- R is the ideal gas constant (0.08206 L atm mol⁻¹ K⁻¹).
- T is the temperature measured in kelvin (K).
As we are solving for the number of moles, rearrange the equation to isolate n:

Given values:
- P = 1.55 atm
- V = 58 L
- R = 0.08206 L atm mol⁻¹ K⁻¹
- T = 222 K
Substitute the values into the formula and solve for n:



Therefore, 4.93 moles of gas occupy a volume of 58 L at a pressure of 1.55 atm and a temperature of 222 K.