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What is the volume, in liters, of 4.00 moles of methane gas, CHâ‚„, at 16°C and 1.70 atm? Express your answer with the appropriate units.

Answer :

Calculated using the Ideal Gas Law. We used the formula PV = nRT and rearranged it to V = nRT / P to find the volume. After substituting the given values and solving, we obtained the final answer.

Solution

In order to solve this, we will use the Ideal Gas Law:

PV = nRT

Where:

  • P is the pressure (1.70 atm)
  • V is the volume (in liters, which we need to find)
  • n is the number of moles (4.00 moles)
  • R is the ideal gas constant (0.0821 L·atm/K·mol)
  • T is the temperature in Kelvin (16°C + 273.15 = 289.15 K)

Rearrange the Ideal Gas Law to solve for volume (V):

V = nRT / P

Plug in the values:

V = (4.00 moles) × (0.0821 L·atm/K·mol) × (289.15 K) / 1.70 atm

Calculate:

V = 55.9233 / 1.70

V ≈ 32.90 L

Therefore, the volume of 4.00 moles of methane gas at 16°C and 1.70 atm is approximately 32.90 L.

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Rewritten by : Jeany