A 18 cm diameter compressed air tank is 60 cm tall.  The pressure at 20 degrees C is 120 atm.   a. How many moles of air are in the tank? in mol.   b. What volume would this air occupy at STP? in M^3.

The gauge pressure in your car tires is 2.55 × 105 Pa at a temperature of 35.0°C when you drive it onto a ferry boat to Alaska. What is the gauge pressure of the tires, in pascals, later when the temperature has dropped to -40.0°C? Assume the volume of each tire does not change.

Suppose that the rms speed of carbon dioxide molecules, with molar mass of 44.0 g/mol, in a flame is found to be 1.2 × 105 m/s a.What temperature, in kelvins, does this represent?  b. What temperature, in celsius does this represent?

A hot air balloon uses the principle of buoyancy to create lift. By making the air inside the balloon less dense then the surrounding air, the balloon is able to lift objects many times its own weight. A large hot air balloon has a maximum balloon volume of 2090 m3. a.  If the air temperature in the balloon is 54 °C, how much additional mass, in kilograms, can the balloon lift? Assume the molar mass of air is 28.97 g/mol, the air density is 1.20 kg/m3, and the air pressure is 1 atm.

An expensive vacuum system can achieve a pressure as low as 1.93 x 10- N/m2 at 28°C. How many atoms are there in a cubic centimeter at this pressure and temperature? X atoms Additional Materials O Reading