An American newscast states that the barometer reads 30.7 in.Hg . Express the atmospheric pressure in each of the following units. Express your answer with the appropriate units. part A: kPa part B: torr

Roasting galena [lead(II) sulfide] is an early step in the industrial isolation of lead. How many liters of sulfur dioxide, measured at STP, are produced by the reaction of 6.45 kg of galena with 145. L of oxygen gas at 220 °C and 2.00 atm? Lead(II) oxide also forms. Be sure your answer has the correct number of significant figures. Note: Reference the Fundamental constants table for additional information. L SO₂ x10 X

An engineer turns the temperature of a gas down, holding the volume constant at 1,250 L. Initially, the temperature of the gas was 684.°C and had a pressure of 208. kPa. Determine the pressure of the gas when the temperature decreased to 155°C.

The typical human lung has a volume when full of approximately 5.0 L. The partial pressure of oxygen in the atmosphere is 160 mm Hg (1 atm = 760 atm). How many moles of oxygen are in the typical human lung when full? (You can assume the air in the lungs is at a normal human body temperature of 37oC.)

If the mercury in a barometer raises 23.3 centimeters due to a change in ambient pressure, what is the corresponding change in pressure in atm?

A mixture of nitrogen and xenon gases, in a 5.99 L flask at 50 °C, contains 2.90 grams of nitrogen and 43.1 grams of xenon. The partial pressure of xenon in the flask is atm and the total pressure in the flask is atm.

A mixture of helium and carbon dioxide gases, in a 7.08 L flask at 81 °C, contains 1.17 grams of helium and 6.24 grams of carbon dioxide. The partial pressure of carbon dioxide in the flask is  atm and the total pressure in the flask is  atm.

3. A certain mass of magnesium is reacted with 6M HCl. The hydrogen gas liberated is collected by displacing 200 mL of water. The pressure of the gas and the atmospheric pressure are equalized. The atmospheric pressure is 762 mmHg. The temperature of the experiment is 27°C. How many moles of hydrogen have been liberated, and what is the mass of the magnesium that reacted?