Principles of Modern Chemistry
8th Edition
ISBN: 9781305079113
Author: David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher: Cengage Learning
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Chapter 2, Problem 17P
A gaseous binary compound has a vapor density that is 1.94 times that of oxygen at the same temperature and pressure. When 1.39 g of the gas is burned in an excess of oxygen, 1.21 g water is formed, removing all the hydrogen originally present.
(a) Estimate the molecular mass of the gaseous compound.
(b) How many hydrogen atoms are there in a molecule of the compound?
(c) What is the maximum possible value of the
(d) Are other values possible for the atomic mass of the second element? Use a table of atomic masses to identify the element that best fits the data.
(e) What is the molecular formula of the compound?
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Using reaction free energy to predict equilibrium composition
Consider the following equilibrium:
N2O4 (g) 2NO2 (g)
AG⁰ = 5.4 kJ
Now suppose a reaction vessel is filled with 1.68 atm of dinitrogen tetroxide (N204) at 148. °C. Answer the following questions about this system:
rise
Under these conditions, will the pressure of N2O4 tend to rise or fall?
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fall
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rise by adding NO2?
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Round your answer to 2 significant digits.
yes
no
0.42 atm
☑
5
0/5
?
مله
Ar
Homework 13 (Ch17)
Question 4 of 4 (1 point) | Question Attempt: 2 of 2
✓ 1
✓ 2
= 3
4
Time Remaining: 4:25:54
Using the thermodynamic information in the ALEKS Data tab, calculate the standard reaction free energy of the following chemical reaction:
2CH3OH (g)+302 (g) → 2CO2 (g) + 4H₂O (g)
Round your answer to zero decimal places.
☐ kJ
x10
☐
Subm
Check
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Identifying the major species in weak acid or weak base equilibria
Your answer is incorrect.
• Row 2: Your answer is incorrect.
• Row 3: Your answer is incorrect.
• Row 6: Your answer is incorrect.
0/5
The preparations of two aqueous solutions are described in the table below. For each solution, write the chemical formulas of the major species present at
equilibrium. You can leave out water itself.
Write the chemical formulas of the species that will act as acids in the 'acids' row, the formulas of the species that will act as bases in the 'bases' row, and the
formulas of the species that will act as neither acids nor bases in the 'other' row.
You will find it useful to keep in mind that HF is a weak acid.
acids:
HF
0.1 mol of NaOH is added to
1.0 L of a 0.7M HF
solution.
bases:
0.13 mol of HCl is added to
1.0 L of a solution that is
1.0M in both HF and KF.
Exponent
other:
F
acids: HF
bases: F
other:
K
1
0,0,...
?
000
18
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Chapter 2 Solutions
Principles of Modern Chemistry
Ch. 2 - A newly synthesized compound has the molecular...Ch. 2 - Acetaminophen is the generic name of the pain...Ch. 2 - Arrange the following compounds from left to right...Ch. 2 - Arrange the following compounds from left to right...Ch. 2 - “Q-gas” is a mixture of 98.70% helium and 1.30%...Ch. 2 - A pharmacist prepares an antiulcer medicine by...Ch. 2 - Zinc phosphate is used as a dental cement. A...Ch. 2 - Bromoform is 94.85% bromine, 0.40% hydrogen, and...Ch. 2 - Fulgurites are the products of the melting that...Ch. 2 - A sample of a “suboxide” of cesium gives up...
Ch. 2 - Barium and nitrogen form two binary compounds...Ch. 2 - Prob. 12PCh. 2 - Prob. 13PCh. 2 - Prob. 14PCh. 2 - The empirical formula of a gaseous fluorocarbon is...Ch. 2 - At its boiling point (280°C) and at atmospheric...Ch. 2 - A gaseous binary compound has a vapor density that...Ch. 2 - A gaseous binary compound has a vapor density that...Ch. 2 - Prob. 19PCh. 2 - Prob. 20PCh. 2 - For each of the following chemical reactions,...Ch. 2 - Prob. 22PCh. 2 - An 18.6-g sample of K2CO3 was treated in such a...Ch. 2 - Prob. 24PCh. 2 - Disilane (Si2H6) is a gas that reacts with oxygen...Ch. 2 - Tetrasilane (Si4H10) is a liquid with a density of...Ch. 2 - Cryolite (Na3AlF6) is used in the production of...Ch. 2 - Carbon disulfide (CS2) is a liquid that is used in...Ch. 2 - Potassium nitrate (KNO3) is used as a fertilizer...Ch. 2 - Elemental phosphorus can be prepared from...Ch. 2 - An element X has a dibromide with the empirical...Ch. 2 - An element A has a triiodide with the formula AI3...Ch. 2 - A mixture consisting of only sodium chloride...Ch. 2 - A mixture of aluminum and iron weighing 9.62 g...Ch. 2 - When ammonia is mixed with hydrogen chloride...Ch. 2 - The poisonous gas hydrogen cyanide (HCN) is...Ch. 2 - The iron oxide Fe2O3 reacts with carbon monoxide...Ch. 2 - Titanium dioxide, TiO2 , reacts with carbon and...Ch. 2 - Human parathormone has the impressive...Ch. 2 - A white oxide of tungsten is 79.2976% tungsten by...Ch. 2 - A dark brown binary compound contains oxygen and...Ch. 2 - A binary compound of nickel and oxygen...Ch. 2 - Two binary oxides of the element manganese...Ch. 2 - A possible practical way to eliminate oxides of...Ch. 2 - Aspartame (molecularformula C14H18N2O5 ) is a...Ch. 2 - Prob. 46APCh. 2 - Prob. 47APCh. 2 - Citric acid (C6H8O7) is made by fermentation of...Ch. 2 - Prob. 49APCh. 2 - A sample of a substance with the empirical formula...Ch. 2 - A newspaper article about the danger of global...Ch. 2 - In the Solvay process for producing sodium...Ch. 2 - A yield of 3.00gKClO4 is obtained from the...Ch. 2 - Prob. 54APCh. 2 - Silicon nitride (Si3N4) , a valuable ceramic, is...
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