Chemistry: AP Edition - Package
9th Edition
ISBN: 9781285729473
Author: ZUMDAHL
Publisher: CENGAGE L
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Textbook Question
Chapter 1, Problem 8ALQ
Sketch a magnified view (showing atoms/molecules) of each of the following and explain:
- a. a heterogeneous mixture of two different compounds
- b. a homogeneous mixture of an element and a 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?
x10
fall
Is it possible to reverse this tendency by adding NO2?
In other words, if you said the pressure of N2O4 will tend to rise, can that
be changed to a tendency to fall by adding NO2? Similarly, if you said the
pressure of N2O4 will tend to fall, can that be changed to a tendency to
rise by adding NO2?
If you said the tendency can be reversed in the second question, calculate
the minimum pressure of NO 2 needed to reverse it.
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
Ar
Chapter 1 Solutions
Chemistry: AP Edition - Package
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