GENERAL CHEMISTRY-MOD.MASTERINGCHEM.
11th Edition
ISBN: 9780134193601
Author: Petrucci
Publisher: PEARSON
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Chapter 6, Problem 103IAE
When working with a mixture of gases, it is sometimes convenient to use an apparent molar mass (a weighted-average molar mess). Thinkterms of replacing the mixture with a hypothetical single gas. What is the apparent molar mass of air, given that air is 78.08% N2, 20.95%O2, 0.93% Ar, and 0.036% CO2, by volume?
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A student decides to conduct an experiment by using two different flasks and two different gas samples. In flask 1, there exists Neon (Ne) gas, whereas the second flask is
filled with nitrogen (N2) gas. If both flasks are kept at 1 K, answer the following questions.
(Note: Molar mass of N2 = 28.014 g mol1, molar mass of Neon = 20.1797 g mol1, R=8.31 J. mol.K-1, k= 1.38 x 10-23 J.K-1, Avogadro's number =
6.02 x 1023
mo/-1
:)
a)
Find the average kinetic energy of one Neon molecule. 6.21e-21
b)
Calculate the average kinetic energy (translational+rotational) of one nitrogen molecule by including rotational motion in your calculations. 1.035e-20
J
c) Find the root-mean-square speed of one neon molecule. 35.14
VV ms-1
5. An experiment is performed to measure the mass percent of CaCO3(s) in eggshells. Five different
samples of CaCO3(s) of known mass react with an excess of 2.0M HCl(aq) in identical sealed, rigid reaction
vessels. The pressure of the gas produced is measured with a pressure gauge attached to the reaction
vessel. Since the reaction is exothermic, the reaction system is cooled to its original temperature before
Cooling the HCl(aq) to a lower temperature than it was in the original experiment
the pressure is recorded. The experimental data are used to create the calibration line below.
Using eggshells that are more finely powdered than those used in the original
experiment
0.10-
0.09
0.08-
Using 2.0M CH3COOH(aq) instead of 2.0M HCl(aq)
0.07
* 0.06-
Reducing the volume of the reaction vessel
0.05
0.04
CLEAR ALL
0.03-
0.02-
0.05
0.10
0.15
0.20
Mass of CaCO3(s) (grams)
The experiment is repeated with an eggshell sample, and the experimental data are recorded in the table
below.
Mass of…
The reaction between SO3 (g) and CO2 (g) is based on the chemical equation below.
2 SO3 (g) + CO2 (g) = CS2 (g) + 4 O2 (g)
At 500 oC, we mix 0.20 mol SO3 (g) 0.25 mol CO2 (g) and 1.20 mol O2 (g) (without CS2 (g)) initially in a 1-L bottle. After the reaction reaches equilibrium, the amount of SO3 (g) becomes 0.12 mol. Determine the value of the equilibrium constant of the above reaction (with 2 significant figures).
Chapter 6 Solutions
GENERAL CHEMISTRY-MOD.MASTERINGCHEM.
Ch. 6 - Convert each pressure to an equivalent pressure in...Ch. 6 - Prob. 2ECh. 6 - Calculate the height of a column of liquid benzene...Ch. 6 - Prob. 4ECh. 6 - Prob. 5ECh. 6 - What is the pressure (in mmHg) of the gas...Ch. 6 - At times, a pressure is stated in units of mass...Ch. 6 - Prob. 8ECh. 6 - A sample of O2(g) has a volume of 26.7 L at 762...Ch. 6 - An 886 mL sample of Ne(g) is at 752 mmHg 26 C....
Ch. 6 - Prob. 11ECh. 6 - We want to change the volume of a fixed amount of...Ch. 6 - Prob. 13ECh. 6 - A sample of N2(g) occupies a volume of 42.0 ml...Ch. 6 - Prob. 15ECh. 6 - Prob. 16ECh. 6 - Prob. 17ECh. 6 - Prob. 18ECh. 6 - Prob. 19ECh. 6 - Prob. 20ECh. 6 - Prob. 21ECh. 6 - Prob. 22ECh. 6 - A sample of gas has a volume of 4.25 L at 25.6 C...Ch. 6 - A 10.0 sample of a gas has a volume of 5.25 L at...Ch. 6 - Prob. 25ECh. 6 - Prob. 26ECh. 6 - What is the volume, in liters, occupied by 89.2 g...Ch. 6 - Prob. 28ECh. 6 - Kr(g) in a 18.5 L cylinder exerts a pressure of...Ch. 6 - Prob. 30ECh. 6 - A laboratory high vacuum system is capable of...Ch. 6 - What is the pressure, in pascals, exerted by 1242...Ch. 6 - What is the molar volume of an ideal gas at (a) 25...Ch. 6 - Prob. 34ECh. 6 - A 0.418 g sample of gas has a volume of 115 mL at...Ch. 6 - What is the molar mass of a gas found to have a...Ch. 6 - Whatis the molecular formula of a gaseous fluoride...Ch. 6 - A 2.650 g sample of a gaseous compound occupies...Ch. 6 - A gaseous hydrocarbon webbing 0.231 g occupies a...Ch. 6 - Prob. 40ECh. 6 - Prob. 41ECh. 6 - Monochloroethylene gas is used to make...Ch. 6 - In order for a gas-filled balloon to rise in air,...Ch. 6 - Prob. 44ECh. 6 - The density of phosphorus vapor is 2.64 g/L at 310...Ch. 6 - A particular gaseous hydrocarbon that is 82.7% C...Ch. 6 - Prob. 47ECh. 6 - Prob. 48ECh. 6 - Prob. 49ECh. 6 - Prob. 50ECh. 6 - Prob. 51ECh. 6 - Hydrogen peroxide, H2O2, is used to disinfect...Ch. 6 - Calculate the volume of H2(g), measured at 26 C...Ch. 6 - The Haber process is the principal method for...Ch. 6 - What is the volume. in liters, occupied by a...Ch. 6 - Prob. 56ECh. 6 - A gas cylinder of 53.7 L volume contains N2(g) at...Ch. 6 - Prob. 58ECh. 6 - Which actions you take to establish a pressure of...Ch. 6 - Prob. 60ECh. 6 - Prob. 61ECh. 6 - The chemical composition of air that is exhaled...Ch. 6 - In the drawing below, 1.00 g H2(g) is maintained...Ch. 6 - In the drawing above, 1.00 g H2(g) at 300 K is...Ch. 6 - Prob. 65ECh. 6 - Prob. 66ECh. 6 - A 1.65 g sample of Al reacts with excess HCI, and...Ch. 6 - An 89.3 mL sample of wet O2(g) is collected over...Ch. 6 - A sampleof O2(g) is collected over water at 24 C....Ch. 6 - Prob. 70ECh. 6 - At elevated temperatures, solid sodium chlorate...Ch. 6 - Prob. 72ECh. 6 - CalculateUnta,in meters per second, for CI2(g)...Ch. 6 - Prob. 74ECh. 6 - Prob. 75ECh. 6 - Prob. 76ECh. 6 - Prob. 77ECh. 6 - Determine um, u, and Urmafor a group often...Ch. 6 - Prob. 79ECh. 6 - Prob. 80ECh. 6 - If 0.00484 mol N2O(g) effuses through an orifice...Ch. 6 - Prob. 82ECh. 6 - What are the ratios of rates for the pairs of...Ch. 6 - Prob. 84ECh. 6 - Prob. 85ECh. 6 - The molar mass of radon gas was first estimated by...Ch. 6 - Prob. 87ECh. 6 - Use both the deal gas equation and the van der...Ch. 6 - Prob. 89ECh. 6 - (a) Use the value of the van der Waals constant b...Ch. 6 - Prob. 91IAECh. 6 - Assume the following initial conditions for the...Ch. 6 - Consider the diagram to the right. The "initial"...Ch. 6 - Two evacuated bubs of equal volume are connected...Ch. 6 - Prob. 95IAECh. 6 - A 0.7178 g sample of a hydrocarbon occupies a...Ch. 6 - Prob. 97IAECh. 6 - Ammonium nitrite, NH4NO2,decomposes according to...Ch. 6 - A mature of 100 g H2 and 860 g O2, introduced into...Ch. 6 - Prob. 100IAECh. 6 - What is the partial pressure of CI2(g) , in...Ch. 6 - Prob. 102IAECh. 6 - When working with a mixture of gases, it is...Ch. 6 - Prob. 104IAECh. 6 - Gas cylinder A has e volume of 48.2 L and contains...Ch. 6 - Prob. 106IAECh. 6 - Producer gas is a type of fuel gas made by passing...Ch. 6 - Prob. 108IAECh. 6 - A mixture of H2(g) and O2(g) is prepared by...Ch. 6 - Prob. 110IAECh. 6 - Prob. 111IAECh. 6 - A breathing mixture is prepared which He is...Ch. 6 - Chlorine dioxide,CIO2, is sometimes used as a...Ch. 6 - The amount of ozone, O2,in a mixture of gases can...Ch. 6 - Prob. 115IAECh. 6 - Prob. 116IAECh. 6 - We have noted that atmospheric pressure depends on...Ch. 6 - Consider a sample ofO2(g) at 298 K and 1.0 atm....Ch. 6 - A nitrogen molecule (N2) having the average...Ch. 6 - Prob. 120IAECh. 6 - Prob. 121IAECh. 6 - Prob. 122IAECh. 6 - Prob. 123IAECh. 6 - A 0.156 g sample of magnesium-aluminum alloy...Ch. 6 - Prob. 125FPCh. 6 - Prob. 126FPCh. 6 - Prob. 127FPCh. 6 - Prob. 128FPCh. 6 - Prob. 129FPCh. 6 - Prob. 130SAECh. 6 - Briefly describe each concept or process: (a)...Ch. 6 - Prob. 132SAECh. 6 - Which exerts the greatest pressure. 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