Connect with LearnSmart for Krauskopf: The Physical Universe, 16e
16th Edition
ISBN: 9781259663895
Author: KRAUSKOPF, Konrad B.
Publisher: Mcgraw-hill Higher Education (us)
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Chapter 12, Problem 13MC
To determine
The correct option from the given set of options.
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a1) Try to give a correct solution.please.
7. An irregularly shaped piece of metal of density 7.8g/cm3 weighs 429 grams when completely immersed in nitrobenzene which has a density of 1.2 g/cm3. Find the volume of the piece of metal.
With sketch of multiple free body diagram, solution, and Given in the problem.
8. In a mixture of weak acid and its salt, the ratio of the concentration of acid to salt is
increased ten fold. The pH of the solution
A. decreases by one
B. decreases by one tenth
C. increases by one
D. increases ten fold
9. In a solution, when the concentrations of a weak acid and its conjugate base are equal,
A. the system is not at equilibrium.
B. the buffering capacity is significantly decreased.
C. the -log of the [H*] and the -log of the K, are equal.
D. all of the above are true.
10. Consider a solution which is 0.10 M in CH3COOH and 0.20 M in NaCH;COO. Which of the
following statements is TRUE?
A. If a small amount of NaOH is added, the pH decreases very slightly.
B. If NaOH is added, the OH" ions react with the CH3CO0' ions.
C. If a small amount of HCl is added, the pH decreases very slightly.
D. If HCl is added, the H* ions react with CH3COOH ions.
Chapter 12 Solutions
Connect with LearnSmart for Krauskopf: The Physical Universe, 16e
Ch. 12 - Prob. 1MCCh. 12 - Prob. 2MCCh. 12 - A substance of unknown composition is heated in an...Ch. 12 - Prob. 4MCCh. 12 - Prob. 5MCCh. 12 - Prob. 6MCCh. 12 - Prob. 7MCCh. 12 - Prob. 8MCCh. 12 - Prob. 9MCCh. 12 - Prob. 10MC
Ch. 12 - Prob. 11MCCh. 12 - Prob. 12MCCh. 12 - Prob. 13MCCh. 12 - Prob. 14MCCh. 12 - Prob. 15MCCh. 12 - Prob. 16MCCh. 12 - Prob. 17MCCh. 12 - Prob. 18MCCh. 12 - Prob. 19MCCh. 12 - When an electric current is passed through molten...Ch. 12 - The quantity actually stored in a storage battery...Ch. 12 - Prob. 22MCCh. 12 - Prob. 23MCCh. 12 - Prob. 24MCCh. 12 - Prob. 25MCCh. 12 - The formula mass of gaseous carbon dioxide, CO2,...Ch. 12 - Prob. 27MCCh. 12 - Prob. 28MCCh. 12 - Prob. 29MCCh. 12 - Prob. 30MCCh. 12 - Prob. 31MCCh. 12 - In round numbers the atomic mass of nitrogen is 14...Ch. 12 - Prob. 33MCCh. 12 - Prob. 34MCCh. 12 - Prob. 35MCCh. 12 - Prob. 1ECh. 12 - Prob. 2ECh. 12 - What role does air play in combustion?Ch. 12 - For a given amount of energy to be used for its...Ch. 12 - Prob. 5ECh. 12 - Prob. 6ECh. 12 - How many moles of aluminum are present in 5 mol of...Ch. 12 - How many moles of atomic oxygen are present in 1...Ch. 12 - How many moles of propane, C3H8, can be prepared...Ch. 12 - Prob. 10ECh. 12 - Prob. 11ECh. 12 - Prob. 12ECh. 12 - Find the mass of 10 mol of uranium, U. How many...Ch. 12 - Prob. 14ECh. 12 - Find the mass of 2 mol of iron(III) oxide, Fe2O3.Ch. 12 - Prob. 16ECh. 12 - How many moles of glucose are present in 500 kg of...Ch. 12 - How many moles of lead nitrate are present in 100...Ch. 12 - Prob. 19ECh. 12 - When potassium chlorate, KClO3, is heated, it...Ch. 12 - Prob. 21ECh. 12 - Prob. 22ECh. 12 - How much sulfur is needed to react with 200 g of...Ch. 12 - Prob. 24ECh. 12 - Prob. 25ECh. 12 - Prob. 26ECh. 12 - Prob. 27ECh. 12 - Prob. 28ECh. 12 - Prob. 29ECh. 12 - Do ions in solution need activation energy to...Ch. 12 - Prob. 31ECh. 12 - Hydrogen peroxide, H2O2, decomposes into water and...Ch. 12 - What is the chief reason that reaction rates...Ch. 12 - Prob. 34ECh. 12 - Suggest three ways to increase the rate at which...Ch. 12 - Suggest three ways to increase the rate at which...Ch. 12 - Give an example of a reaction that is (a)...Ch. 12 - Under ordinary circumstances coal burns slowly,...Ch. 12 - Why is a reaction with a high activation energy...Ch. 12 - To what extent does the time needed for a strong...Ch. 12 - How common are reversible chemical reactions?Ch. 12 - Prob. 42ECh. 12 - Changing the pressure has no effect on the...Ch. 12 - Prob. 44ECh. 12 - Prob. 45ECh. 12 - Prob. 46ECh. 12 - Prob. 47ECh. 12 - Prob. 48ECh. 12 - Prob. 49ECh. 12 - Prob. 50ECh. 12 - Prob. 51ECh. 12 - Prob. 52ECh. 12 - When an electric current is passed through a...Ch. 12 - When an electric current is passed through a...Ch. 12 - Prob. 55ECh. 12 - Prob. 56ECh. 12 - What do you think happens when a charging current...Ch. 12 - Prob. 58E
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