Chemistry & Chemical Reactivity
9th Edition
ISBN: 9781133949640
Author: John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher: Cengage Learning
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Chapter 20, Problem 29PS
In methane hydrate the methane molecule is trapped in a cage of water molecules. Describe the structure: (a) how many water molecules make up the cage, (b) how many hydrogen bonds are involved, and (c) how many faces does the cage have? (Figure 20 16.)
(a) Methane hydrate burns as methane gas escapes from the solid hydrate.
(b) Methane hydrate consists of a lattice of water molecules with methane molecules trapped in the cavity.
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A student experimentally determines the gas law constant, R, by reacting a small piece of magnesium
with excess hydrochloric acid and then collecting the hydrogen gas over water in a eudiometer. Based
L-atm
on experimentally collected data, the student calculates R to equal 0.0832
mol·K
L-atm
Ideal gas law constant from literature: 0.08206
mol·K
(a) Determine the percent error for the student's R-value.
Percent error =
%
(b) For the statements below, identify the possible source(s) of error for this student's trial.
The student notices a large air bubble in the eudiometer after collecting the hydrogen gas, but
does not dislodge it.
The student does not clean the zinc metal with sand paper.
The student does not equilibrate the water levels within the eudiometer and the beaker at the
end of the reaction. The water level in the eudiometer is 1-inch above the water level in the
beaker.
The student uses the barometric pressure for the lab to calculate R.
Calculate the saturation or equilibrium concentration (mg/L) of oxygen, nitrogen, and carbon dioxide in water at 0, 20 and 40degrees Celius., assuming that their percentage by volume in the atmosphere is 21%, 79%, and 0.03%, respectively at 1 atm.
Chapter 20 Solutions
Chemistry & Chemical Reactivity
Ch. 20.1 - Prob. 1RCCh. 20.1 - Prob. 2RCCh. 20.2 - Prob. 1RCCh. 20.2 - Prob. 2RCCh. 20.3 - Prob. 1RCCh. 20.3 - Prob. 2RCCh. 20.3 - Prob. 3RCCh. 20.4 - Prob. 1RCCh. 20.4 - Prob. 2RCCh. 20.4 - 3. Which of the following is a renewable energy...
Ch. 20.5 - Prob. 1RCCh. 20.5 - Prob. 2RCCh. 20.6 - Prob. 1QCh. 20.6 - Prob. 1RCCh. 20.7 - Prob. 1QCh. 20.7 - Prob. 2QCh. 20 - In the discussion on the composition of air,...Ch. 20 - Prob. 2PSCh. 20 - Prob. 3PSCh. 20 - Dinitrogen monoxide, N2O (commonly called nitrous...Ch. 20 - Prob. 5PSCh. 20 - Prob. 6PSCh. 20 - Prob. 9PSCh. 20 - Although there are a number of...Ch. 20 - Prob. 12PSCh. 20 - Prob. 13PSCh. 20 - Prob. 14PSCh. 20 - Prob. 15PSCh. 20 - Prob. 17PSCh. 20 - The enthalpy of combustion of isooctane (C8H18),...Ch. 20 - Energy consumption in the United States amounts to...Ch. 20 - Prob. 20PSCh. 20 - Prob. 23PSCh. 20 - Prob. 25PSCh. 20 - Prob. 28PSCh. 20 - In methane hydrate the methane molecule is trapped...Ch. 20 - Prob. 30PSCh. 20 - Prob. 31PSCh. 20 - Prob. 32PSCh. 20 - Prob. 33PSCh. 20 - Prob. 34PSCh. 20 - Prob. 35GQCh. 20 - Prob. 36GQCh. 20 - Prob. 37GQCh. 20 - Prob. 38GQCh. 20 - Prob. 40GQCh. 20 - Prob. 41ILCh. 20 - Prob. 42ILCh. 20 - Define the terms renewable and nonrenewable as...Ch. 20 - Prob. 44SCQCh. 20 - Prob. 45SCQCh. 20 - Prob. 46SCQCh. 20 - Prob. 47SCQCh. 20 - What is the likelihood that hydrogen (H2) will...Ch. 20 - Prob. 49SCQCh. 20 - Which sulfur compounds are atmospheric pollutants?...
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