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Consider the accompanying energy diagram. (a) Does this diagram represent an increase or decrease in the internal energy of the system?

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Imagine a book that is falling from a shelf. At a particular moment during its fall, the book has a kinetic energy of 13 J and a potential energy with respect to the floor of 72 J. How does the book's kinetic energy and its potential energy change as it continues to fall? What is its total kinetic energy at the instant just before it strikes the floor?

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(b) How many milliliters of 0.125 M H 2SO4 are needed to neutralize 0.200 g of NaOH?

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(a) How many milliliters of 0.120 M HCl are needed to completely neutralize 50.0 mL of 0.101 M Ba(OH)2 solution?

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What mass of NaOH is needed to precipitate the Cd  2+ ions from 35.0 mL of 0.500 M Cd(NO3)2 solution?

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What mass of KCl is needed to precipitate the silver ions from 15.0 mL of 0.200 M AgNO3 solution?

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Glycerol, C3H8O3, is a substance used extensively in the manufacture of cosmetics, foodstuffs, antifreeze, and plastics. Glycerol is a water-soluble liquid with a density of 1.2656 g/L at 15°C. Calculate the molarity of a solution of glycerol made by dissolving 50.000 mL glycerol at 15°C in enough water to make 250.00 mL of solution.

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Pure acetic acid, known as glacial acetic acid, is a liquid with a density of 1.049 g/mL at 25°C. Calculate the molarity of a solution of acetic acid made by dissolving 20.00 mL of glacial acetic acid at 25°C in enough water to make 250.0 mL of solution.

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(b) If you dilute 25.0 mL of the stock solution to a final volume of 0.500 L, what will be the concentration of the diluted solution?

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(a) How many milliliters of a stock solution of 10.0 M HNO 3 would you have to use to prepare 0.450 L of 0.500 M HNO3?

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Indicate the concentration of each ion present in the solution formed by mixing (c) 3.60 g KCl in 75.0 mL of 0.250 M CaCl2 solution. Assume that the volumes are additive.

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Indicate the concentration of each ion present in the solution formed by mixing (b) 44.0 mL of 0.100 M and Na2SO4 and 25.0 mL of 0.150 M KCl. Assume that the volumes are additive.

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Indicate the concentration of each ion or molecule present in the following solutions: (d) a mixture of 45.0 mL of 0.272 M NaCl and 65.0 mL of 0.0247 M (NH4)2CO3. Assume that the volumes are additive.

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Indicate the concentration of each ion or molecule present in the following solutions: (c) 0.0150 M C6H12O6

Assume that the volumes are additive.

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Indicate the concentration of each ion or molecule present in the following solutions: (b) 1.3 x 10–2 MgSO4

Assume that the volumes are additive.

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Indicate the concentration of each ion or molecule present in the following solutions: (a) 0.25 M NaNO3

Assume that the volumes are additive.

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In each of the following pairs, indicate which has the higher concentration of Cl  ion: (c) 0.050 M HCl solution or 0.020 M CdCl2 solution.

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In each of the following pairs, indicate which has the higher concentration of Cl ion: (b) 100 mL of 0.10 M KCI solution or 400 mL of 0.080 M LiCI solution

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In each of the following pairs, indicate which has the higher concentration of Cl  ion: (a) 0.10 M CaCl2 or 0.15 M KCI solution

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(c) How many milliliters of 0.0250 M CuSO4 contain 1.75 g of solute?

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(b) If 4.00 g of (NH 4)2SO4 is dissolved in enough water to form 400 mL of solution, what is the molarity of the solution?

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(a) How many grams of solute are present in 50.0 mL of 0.488 M K  2Cr2O7?

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A person suffering from hyponatremia has a sodium ion concentration in the blood of 0.118 M and a total blood volume of 4.6 L. What mass of sodium chloride would need to be added to the blood to bring the sodium ion concentration up to 0.138 M, assuming no change in blood volume?

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The average adult human male has a total blood volume of 5.0 L. If the concentration of sodium ion in this average individual is 0.135 M, what is the mass of sodium ion circulating in the blood?

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(c) How many milliliters of 11.6 M HCl solution are needed to obtain 0.250 mol of HCl?

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