B. In the following graphs, velocity represents the molecular speed,Velocity (m/s)(i)If the plot represents the velocity distribution of 1.0 L of O2 (g) at temperature of 2273 Kversus 127 K, which plot corresponds to each temperature? Briefly explain(ii)If the plot represents the velocity distribution of 1.0 L of He (g) at STP and 1.0 L of Cl, (g)at STP, which plot corresponds to which gas? Briefly explain.C. Calculate the molar mass of a gas X2 if equal volumes of X2 and hydrogen gas take 9.12 and1.20 minutes, respectively, to effuse into a vacuum through a small hole under the same conditions ofconstant pressure and temperature.Relative number of molecules

Ideal gases are hypothetical gases which do have real existence. A gas can behave ideally at low…

B. In the following graphs, velocity represents the molecular speed, Velocity (m/s) (i) If the plot represents the velocity distribution of 1.0 L of O2 (g) at temperature of 2273 K versus 127 K, which plot corresponds to each temperature? Briefly explain If the plot represents the velocity distribution of 1.0 L of He (g) at STP and 1.0 L of Cl2 (g) (ii) at STP, which plot corresponds to which gas? Briefly explain. Relative number of molecules

B. In the following graphs, velocity represents the molecular speed, Velocity (m/s) (i) If the plot represents the velocity distribution of 1.0 L of O2 (g) at temperature of 2273 K versus 127 K, which plot corresponds to each temperature? Briefly explain If the plot represents the velocity distribution of 1.0 L of He (g) at STP and 1.0 L of Cl2 (g) (ii) at STP, which plot corresponds to which gas? Briefly explain. Relative number of molecules

Chemistry: An Atoms First Approach

2nd Edition

ISBN:9781305079243

Author:Steven S. Zumdahl, Susan A. Zumdahl

Publisher:Steven S. Zumdahl, Susan A. Zumdahl

Chapter8: Gases

Section: Chapter Questions

Problem 7RQ

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5-118 Isooctane, which has a chemical formula C8H18 is the component of gasoline from which the term octane rating derives. (a) Write the balanced chemical equation for the combustion of isooctane. (b) The density of isooctane is 0.792 g/mL. How many kg of C02 are produced each year by the annual U.S. gasoline consumption of L? (c) What is the volume in liters of this CO2 at STP? (d) The chemical formula for isooctane can be represented by (CH3)3CCH2CH(CH3)2. Draw a Lewis structure of isooctane. (e) Another molecule with the same molecular formula is octane, which can be represented by: When comparing isooctane and octane, one structure is observed to have a boiling point of 99°C, while another is known to have a boiling point Of 125°C. Which substance, isooctane or octane, is expected to have the higher boiling point? (f) Determine whether isooctane or octane is expected to have the greater vapor pressure.
While resting, the average 70-kg human male consumes 14 L of pure O2 per hour at 25 C and 100 kPa. How many moles of 02 are consumed by a 70 kg man while resting for 1.0 h?
5-113 Ammonia and gaseous hydrogen chloride react to form ammonium chloride according to the following equation: If 4.21 L of NH3(g) at 27°C and 1.02 atm is combined with 5.35 L of HCI(g) at 26°C and 0.998 atm, what mass of NH4CI(s) will be generated?
If 1 cubic foot-28.3 L-of air at common room conditions of 230C and 0.985 bar is adjusted to STP, what does the volume become?
A mixture of chromium and zinc weighing 0.362 g was reacted with an excess of hydrochloric acid. After all the metals in the mixture reacted, 225 mL dry of hydrogen gas was collected at 27C and 750. torr. Determine the mass percent of Zn in the metal sample. [Zinc reacts with hydrochloric acid to produce zinc chloride and hydrogen gas; chromium reacts with hydrochloric acid to produce chromium(III) chloride and hydrogen gas.]
At what temperature will a molecule of uranium hexafluoride, the densest gas known, have the same average speed as a molecule of the lightest gas, hydrogen, at 37C?
5-54 Automobile air bags are inflated by nitrogen gas. When a significant collision occurs, an electronic sensor triggers the decomposition of sodium azide to form nitrogen gas and sodium metal. The nitrogen gas then inflates nylon bags, which protect the driver and front-seat passenger from impact with the dashboard and windshield. What volume of nitrogen gas measured at 1 atm and 27°C is formed by the decomposition of 100. g of sodium azide?
The density of liquid oxygen is about 1.4 g/cm3. Vaporized at 00C and 760 torr, this same 1.4 g occupies 980 cm3, an expansion of 700 times the liquids volume.
88 Liquid oxygen for use as a rocket fuel can be produced by cooling dry air to 183°C, where the O2 condenses. How many liters of dry air at 25°C and 750 torr would need to be processed to produce 150 L of liquid O2 at 183°C? (The mole fraction of oxygen in dry air is 0.21, and the density of liquid oxygen is 1.14g/mL.)
A 275-mL sample of CO gas is collected over water at 31C and 755 mmHg. If the temperature of the gas collection apparatus rises to 39C, what is the new volume of the sample? Assume that the barometric pressure does not change.
Helium gas, He, at 22C and 1.00 atm occupied a vessel whose volume was 2.54 L. What volume would this gas occupy if it were cooled to liquid-nitrogen temperature (197C)?
What is the temperature of an 11.2-L sample of carbon monoxide, CO, at 744 torr if it occupies 13.3 L at 55 C and 74-4 torr?