What is the density of CO2 (g) at 25.0 °C and 3.25 atm? (R = 0.08206 L • atm/K • mol, Molec Wt of CO2 = 44.0 g/moll)

Departmental Problems for Chapter 5: Gases In the 2015 AFC championship football game, it was alleged that the New England Patriots ber the rules by using underinflated footballs. NFL regulations require footballs to be inflated to between 12.5 and 13.5 psi (psi = pounds per square inch). [Note: this is gauge pressure, not ab- solute pressure.] One football actually used in the game was measured to have a pressure of onl 10.5 psi (gauge). One of the Patriots' coaches later alleged that the explanation was due simply gas behavior: pressure decreases as the temperature decreases. Let's examine that last claim. Suppose that the football remained sealed and nearly rigid (i.e. the volume and moles of gas within the ball did not change). A nearby airport measured the air pressure at game time to be 100.95 kPa. The temperature on the field at the start of the game was 51°F. Suppose that the ball was originally inflated in the locker room to the minimum pressure of 12.5 psi (gauge). In order…

A gas mixture contains 0.700  mol of N2, 0.350  mol of H2, and 0.100  mol of CH4. What is the mole fraction of H2 in the mixture?

What is the mole fraction He gas  in a gas mixture containing 0.87 mol He and 6.60 mol O2? Report your answer with two decimals.

A gaseous mixture consists of 1.54 mol of helium, 0.36 mol of neon, and 1.58 mol of argon. What is the mole fraction of helium in the mixture?