A sample of gas at 250 K has a pressure of 0.857 atm and a volume of 115 L. How many moles of gas are in the sample?

Respuesta :

Answer:

0.208 mol

Explanation:

Assuming the gas sample behaves like an ideal gas, we can solve this problem by using the following formula:

  • PV = nRT

Where:

  • P = 0.857 atm
  • V = 115 L
  • n = ?
  • R = 0.082 atm·L·mol⁻¹·K⁻¹
  • T = 250 K

We input the data:

  • 0.857 atm * 115 L = n * 0.082 atm·L·mol⁻¹·K⁻¹ * 250 K

And solve for n:

  • n = 0.208 mol