Answer:
1.29 atm.
Explanation:
- To calculate the volume of a gas, we can use the general law of ideal gas: PV = nRT.
where, P is the pressure of the gas in atm.
V is the volume of the gas in L.
n is the no. of moles of the gas in mol.
R is the general gas constant,
T is the temperature of the gas in K.
- If n and T are constant, and have two different values of V and P:
P₁V₁ = P₂V₂
P1 = 2.15 atm, V1 = 750 mL = 0.75 L.
P₂ = ??? atm, V₂ = 1.25 L.
∴ P₂ = P₁V₁/V₂ = (2.15 atm)(0.75 L)/(1.25 L) = 1.29 atm.
