What is the molar mass of a gas if 150.0 mL has a mass of 0.922 g at 99 ° and 107.0 kPa? *

How many liters of HCI gas, measured at 30.0 C and 745 torr, are required to prepare 1.25 L of a 3.20-M solution of hydrochloric acid?

5-111 Diving, particularly SCUBA (Self-Contained Underwater Breathing Apparatus) diving, subjects the body to increased pressure. Each 10. m (approximately 33 ft) of water exerts an additional pressure of 1 atm on the body. (a) What is the pressure on the body at a depth of 100. ft? (b) The partial pressure of nitrogen gas in air at 1 atm is 593 mm Hg. Assuming a SCUBA diver breathes compressed air, what is the partial pressure of nitrogen entering the lungs from a breathing tank at a depth of 100. ft? (c) The partial pressure of oxygen gas in the air at 2 atm is 158 mm Hg. What is the partial pressure of oxygen in the air in the lungs at a depth of 100. ft? (d) Why is it absolutely essential to exhale vigorously in a rapid ascent from a depth of 100. ft?

5.32 Cylinders of compressed gases are often labeled to show how many “SCF” or “standard cubic feet” of gas they contain. 1 SCF of gas occupies a volume of 1 ft3 at a standard temperature and pressure of 0°C and 1 atm. A particular cylinder weighs 122 lb. when empty and 155 lb. when filled with krypton gas at 26°C. How many SCF of Kr does this cylinder contain?

A typical barometric pressure in Redding. California, is about 750 mm Hg. Calculate this pressure in atm and kPa.

Indicate which represents the higher pressure in each of the following pairs: (a) 534 mm Hg or 0.754 bar (b) 534 mm Hg or 650 kPa (c) 1.34 bar or 934 kPa

2. If you mix 1.5 L of B2H6 with 4.0 L of O2, each at 0 °C and a pressure of 1.0 atm, what amount of water is produced? 0.18 mol 0.067 ml 0.25 mol 0.060 mol

5-107 If 60.0 g of NH3 occupies 35.1 L under a pressure of 77.2 in. Hg, what is the temperature of the gas, in °C?

Nitrogen gas can be obtained by decomposing ammonium nitrate at high temperatures. The nitrogen gas is collected over water in a 500-mL (three significant figures) flask at 19C. The ambient pressure is 745 mm Hg. (Vapor pressure of water at 19C is 16.48 mm Hg.) (a) What is the partial pressure of nitrogen? (b) How many moles of water are there in the wet gas? (c) How many moles of dry gas are collected? (d) If 0.128 g of Ne are added to the flask at the same temperature, what is the partial pressure of neon in the flask? (e) What is the total pressure after Ne is added?

An 80:20 mixture by mass of N₂ and O₂ is placed in a 5.00 L cylinder at a total pressure of 30.0 kPa and at 32.0 °C. What is the mass of the mixture? Select one: O a. 16.8 mg O b. 1.20 g O c. 1.70 g O d. 59.2 mg If 3.7 g of CuSO, is dissolved in 5.0 x 10¹ g of H₂O, what is the mass percent of CuSO, in the solution? Select one: a. 7.4% Ob. 8.0% OC. 6.9%