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Introductory Chemistry: A Foundation

9th Edition

ISBN:9781337399425

Author:Steven S. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Donald J. DeCoste

Chapter15: Solutions

Section: Chapter Questions

Problem 10CR

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Please choose the correct answer for each question:

1. Which of the following is a unit of volume/volume?

A. ppm_m; B. ppm_V; C. mg/L; D. atm

2. In the ideal law gas equation (i.e. PV = nRT), n is ______

A.partial pressure ; B. the number of moles; C. universal gas constant; D. temperature

3. When a reaction system is at chemical equilibrium, concentrations of all the substances in the system are NOT changed with _____

A. time; B. volume; C. temperature; D. mass

4. Which of the following is NOT an equilibrium constant?

A. Henry’s Law constant; B. solubility product; C. acidity constant; D. 2^nd order rate constant

5. The solubility of ferrous carbonate (FeCO₃) at 20^oC is 0.00066g/L. That is, 0.00066 g FeCO₃ can be dissolved in 1 L water at 20^oC at chemical equilibrium. Its dissociation is FeCO₃ = Fe²⁺ + CO₃^2-. If we have known that 0.00132 g FeCO₃ has been dissolved in a cup of 2 L water, please estimate how many grams of FeCO₃ will be additionally dissolved after we add 0.00132 more grams of FeCO₃ to the cup?

A.0; B. 0.00066 C. 0.00132; D. Not to be determined

Definition Definition Law that is the combined form of Boyle's Law, Charles's Law, and Avogadro's Law. This law is obeyed by all ideal gas. Boyle's Law states that pressure is inversely proportional to volume. Charles's Law states that volume is in direct relation to temperature. Avogadro's Law shows that volume is in direct relation to the number of moles in the gas. The mathematical equation for the ideal gas law equation has been formulated by taking all the equations into account: PV=nRT Where P = pressure of the ideal gas V = volume of the ideal gas n = amount of ideal gas measured in moles R = universal gas constant and its value is 8.314 J.K-1mol-1 T = temperature

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