Chemistry (AP Edition)
9th Edition
ISBN: 9781133611103
Author: Steven S. Zumdahl, Susan A. Zumdahl
Publisher: Brooks Cole
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Chapter 5, Problem 150CP
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 27°C 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.]
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LTS
Solid:
AT=Te-Ti
Trial 1
Trial 2
Trial 3
Average
ΔΗ
Mass water, g
24.096
23.976
23.975
Moles of solid, mol
0.01763
001767
0101781
Temp. change, °C
2.9°C
11700
2.0°C
Heat of reaction, J
-292.37J -170.473
-193.26J
AH, kJ/mole
16.58K 9.647 kJ 10.85 kr
16.58K59.64701
KJ
mol
12.35k
Minimum AS,
J/mol K
41.582
mol-k
Remember: q = mCsAT (m = mass of water, Cs=4.184J/g°C) & qsin =-qrxn &
Show your calculations for:
AH in J and then in kJ/mole for Trial 1:
qa (24.0969)(4.1845/g) (-2.9°C)=-292.37J
qsin =
qrxn =
292.35 292.37J
AH in J = 292.375 0.2923kJ
0.01763m01
=1.65×107
AH in kJ/mol =
=
16.58K
0.01763mol
mol
qrx
Minimum AS in J/mol K (Hint: use the average initial temperature of the three trials, con
Kelvin.)
AS=AHIT
(1.65×10(9.64×103) + (1.0
Jimai
For the compound: C8H17NO2
Use the following information to come up with a plausible structure:
8
This compound has "carboxylic acid amide" and ether functional groups.
The peaks at 1.2ppm are two signals that are overlapping one another.
One of the two signals is a doublet that represents 6 hydrogens; the
other signal is a quartet that represents 3 hydrogens.
Vnk the elements or compounds in the table below in decreasing order of their boiling points. That is, choose 1 next to the substance with the highest bolling
point, choose 2 next to the substance with the next highest boiling point, and so on.
substance
C
D
chemical symbol,
chemical formula
or Lewis structure.
CH,-N-CH,
CH,
H
H 10: H
C-C-H
H H H
Cale
H 10:
H-C-C-N-CH,
Bri
CH,
boiling point
(C)
Сен
(C) B
(Choose
Chapter 5 Solutions
Chemistry (AP Edition)
Ch. 5 - Prob. 1RQCh. 5 - Prob. 2RQCh. 5 - Prob. 3RQCh. 5 - Prob. 4RQCh. 5 - Prob. 5RQCh. 5 - Prob. 6RQCh. 5 - Prob. 7RQCh. 5 - Prob. 8RQCh. 5 - Prob. 9RQCh. 5 - Why do real gases not always behave ideally? Under...
Ch. 5 - Prob. 3ALQCh. 5 - Prob. 4ALQCh. 5 - Prob. 6ALQCh. 5 - Prob. 8ALQCh. 5 - Prob. 11ALQCh. 5 - Prob. 12ALQCh. 5 - Prob. 15ALQCh. 5 - Prob. 16ALQCh. 5 - Draw molecular-level views that show the...Ch. 5 - Prob. 20QCh. 5 - Prob. 21QCh. 5 - Prob. 22QCh. 5 - Prob. 23QCh. 5 - As weather balloons rise from the earths surface,...Ch. 5 - Prob. 25QCh. 5 - Consider two different containers, each filled...Ch. 5 - Prob. 27QCh. 5 - Prob. 28QCh. 5 - Prob. 29QCh. 5 - Prob. 30QCh. 5 - Prob. 31QCh. 5 - Prob. 32QCh. 5 - Prob. 33QCh. 5 - Without looking at a table of values, which of the...Ch. 5 - Prob. 35QCh. 5 - Prob. 36QCh. 5 - Prob. 37ECh. 5 - Prob. 38ECh. 5 - A sealed-tube manometer (as shown below) can be...Ch. 5 - Prob. 40ECh. 5 - A diagram for an open-tube manometer is shown...Ch. 5 - Prob. 42ECh. 5 - Prob. 43ECh. 5 - Prob. 44ECh. 5 - Prob. 45ECh. 5 - Prob. 46ECh. 5 - Prob. 47ECh. 5 - Prob. 48ECh. 5 - Prob. 49ECh. 5 - Prob. 50ECh. 5 - The Steel reaction vessel of a bomb calorimeter,...Ch. 5 - A 5.0-L flask contains 0.60 g O2 at a temperature...Ch. 5 - Prob. 53ECh. 5 - A person accidentally swallows a drop of liquid...Ch. 5 - A gas sample containing 1.50 moles at 25C exerts a...Ch. 5 - Prob. 56ECh. 5 - Prob. 57ECh. 5 - What will be the effect on the volume of an ideal...Ch. 5 - Prob. 59ECh. 5 - Prob. 60ECh. 5 - An ideal gas is contained in a cylinder with a...Ch. 5 - Prob. 62ECh. 5 - A sealed balloon is filled with 1.00 L helium at...Ch. 5 - Prob. 64ECh. 5 - Consider the following reaction:...Ch. 5 - A student adds 4.00 g of dry ice (solid CO2) to an...Ch. 5 - Air bags are activated when a severe impact causes...Ch. 5 - Concentrated hydrogen peroxide solutions are...Ch. 5 - In 1897 the Swedish explorer Andre tried to reach...Ch. 5 - Sulfur trioxide, SO3, is produced in enormous...Ch. 5 - A 15.0-L rigid container was charged with 0.500...Ch. 5 - An important process for the production of...Ch. 5 - Consider the reaction between 50.0 mL liquid...Ch. 5 - Urea (H2NCONH2) is used extensively as a nitrogen...Ch. 5 - Prob. 75ECh. 5 - Prob. 76ECh. 5 - Prob. 77ECh. 5 - A compound has the empirical formula CHCl. A...Ch. 5 - Prob. 79ECh. 5 - Given that a sample of air is made up of nitrogen,...Ch. 5 - Prob. 81ECh. 5 - Prob. 82ECh. 5 - A piece of solid carbon dioxide, with a mass of...Ch. 5 - Prob. 84ECh. 5 - Consider the flasks in the following diagram. What...Ch. 5 - Consider the flask apparatus in Exercise 85, which...Ch. 5 - Prob. 87ECh. 5 - At 0C a 1.0-L flask contains 5.0 102 mole of N2,...Ch. 5 - Prob. 89ECh. 5 - A tank contains a mixture of 52.5 g oxygen gas and...Ch. 5 - Prob. 91ECh. 5 - Helium is collected over water at 25C and 1.00 atm...Ch. 5 - At elevated temperatures, sodium chlorate...Ch. 5 - Xenon and fluorine will react to form binary...Ch. 5 - Methanol (CH3OH) can be produced by the following...Ch. 5 - In the Mthode Champenoise, grape juice is...Ch. 5 - Hydrogen azide, HN3, decomposes on heating by the...Ch. 5 - Prob. 98ECh. 5 - Prob. 99ECh. 5 - The oxides of Group 2A metals (symbolized by M...Ch. 5 - Prob. 101ECh. 5 - Prob. 102ECh. 5 - Prob. 103ECh. 5 - Prob. 104ECh. 5 - Prob. 105ECh. 5 - Prob. 106ECh. 5 - Prob. 107ECh. 5 - Prob. 108ECh. 5 - Prob. 109ECh. 5 - Prob. 110ECh. 5 - Prob. 111ECh. 5 - Prob. 112ECh. 5 - Prob. 113ECh. 5 - Prob. 114ECh. 5 - Prob. 115ECh. 5 - Prob. 116ECh. 5 - Use the data in Table 84 to calculate the partial...Ch. 5 - Prob. 118ECh. 5 - Prob. 119ECh. 5 - Prob. 120ECh. 5 - Prob. 121ECh. 5 - Prob. 122ECh. 5 - Prob. 123AECh. 5 - At STP, 1.0 L Br2 reacts completely with 3.0 L F2,...Ch. 5 - Prob. 125AECh. 5 - Prob. 126AECh. 5 - Prob. 127AECh. 5 - Cyclopropane, a gas that when mixed with oxygen is...Ch. 5 - The nitrogen content of organic compounds can be...Ch. 5 - Prob. 130AECh. 5 - A 15.0L tank is filled with H2 to a pressure of...Ch. 5 - A spherical glass container of unknown volume...Ch. 5 - Prob. 133AECh. 5 - A 20.0L stainless steel container at 25C was...Ch. 5 - Metallic molybdenum can be produced from the...Ch. 5 - Prob. 136AECh. 5 - Prob. 137AECh. 5 - One of the chemical controversies of the...Ch. 5 - An organic compound contains C, H, N, and O....Ch. 5 - Prob. 140AECh. 5 - Prob. 141CWPCh. 5 - Prob. 142CWPCh. 5 - A certain flexible weather balloon contains helium...Ch. 5 - A large flask with a volume of 936 mL is evacuated...Ch. 5 - A 20.0L nickel container was charged with 0.859...Ch. 5 - Consider the unbalanced chemical equation below:...Ch. 5 - Prob. 147CWPCh. 5 - Which of the following statements is(are) true? a....Ch. 5 - A chemist weighed out 5.14 g of a mixture...Ch. 5 - A mixture of chromium and zinc weighing 0.362 g...Ch. 5 - Prob. 151CPCh. 5 - You have an equimolar mixture of the gases SO2 and...Ch. 5 - Methane (CH4) gas flows into a combustion chamber...Ch. 5 - Prob. 154CPCh. 5 - Prob. 155CPCh. 5 - Prob. 156CPCh. 5 - You have a helium balloon at 1.00 atm and 25C. You...Ch. 5 - We state that the ideal gas law tends to hold best...Ch. 5 - You are given an unknown gaseous binary compound...Ch. 5 - Prob. 160CPCh. 5 - In the presence of nitric acid, UO2+ undergoes a...Ch. 5 - Silane, SiH4, is the silicon analogue of methane,...Ch. 5 - Prob. 163IPCh. 5 - Prob. 164IPCh. 5 - Prob. 165MP
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