# Problem: Olympic cyclists fill their tires with helium to make them lighter. Assume that the volume of the tire is 860 mL , that it is filled to a total pressure of 125 psi , and that the temperature is 25 oC. Also, assume an average molar mass for air of 28.8 g/mol.Calculate the mass of air in an air-filled tire.

###### FREE Expert Solution

We are asked to calculate the mass of air in an air-filled tire.

Given:

MM = 28.8 g/mol

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###### Problem Details

Olympic cyclists fill their tires with helium to make them lighter. Assume that the volume of the tire is 860 mL , that it is filled to a total pressure of 125 psi , and that the temperature is 25 oC. Also, assume an average molar mass for air of 28.8 g/mol.

Calculate the mass of air in an air-filled tire.