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Chemistry Gas Laws

Q. A sample of a gas occupies 2.78 x 10^3 mL at 25 °C and 760 mmHg. What volume will it occupy at the same temperature and 475 mmHg? A. 1.74 L B. 4.45 L C. 1.04 L D. 3.67 L E. none of the above

Solved • Apr 1, 2020

Chemistry Gas Laws

Q. A helium balloon is filled on the ground where the atmospheric pressure is 768 torr. The volume of the balloon is 8.00 m^3. When the balloon reaches an altitude of 4200 m, its volume is found to be 16.8 m^3. Assume that the temperature remains constant, what is the air pressure at 4200 m in torr? A. 1.61 x 10^3 B. 366 C. 543 D. 111 E. 89

Solved • Apr 1, 2020

Standard Temperature and Pressure

Q. A 14.0 g sample of N2 gas occupies what volume at STP? A. 5.6 L B. 11.2 L C. 22.4 L D. 14 L

Solved • Apr 1, 2020

Pressure Units

Q. Which of the following indicates the greatest pressure? A. 1 atm B. 777 torr C. 5.5 mm Hg D. 1000 Pa E. 12 psi

Solved • Apr 1, 2020

Chemistry Gas Laws

Q. A sample of a ideal gas occuies 2.78 x 10^3 ml at 25 °C and 760 mmHg. What volume will it occupy at the same temperature and 475 mm Hg? A. 1.74 L B. 4.45 L C. 1.04 L D. 3.67 mL E. none of the above

Solved • Apr 1, 2020

Galvanic Cell

Q. Assume that you want to construct a voltaic cell that uses the following half reactions: A^2+(aq) + 2 e^- → A (s) E°red = -0.10V B^2+(aq) + 2 e^- → B (s) E°red = -1.06V You begin with the incomplete cell pictured below, in What additions must you make to the cell for it to go generate a standard emf? Check all that apply.

Solved • Mar 5, 2020

Electron Configuration

Q. Nonmetals gain electrons under certain conditions to attain a noble electron configuration. How many electrons must be gain by the element sulfur (S) to attain noble gas electron configuration? Number of electrons: ----- a) xenon b) helium c) radon d) argon e) krypton f) neon

Solved • Mar 31, 2020