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How much heat is required to warm 1.30 L of water from 22.0^\circ C to 100.0 ^\circ {\rm C}?
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how many grams of magnesium must react to displace 12.5 of silver from a solution of silver nitrate?
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3. Ethylene glycol, an antifreeze, has a density of 1.11 g/ml at 20 C. (a) What is the mass, in grams, of 452 ml ethylene glycol? (b) What is the mass, in kilogram, of 18.6 L ethylene glycol (c) What is the volume, in milliliters, occupied by 65g ethylene glycol?
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Calculate the amount of heat transferred when 49.0 of is decomposed by this reaction at constant pressure.
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A student placed 16.5 of glucose () in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the 100.- mark on the neck of the flask was reached. The flask was then shaken until the solution was uniform. A 20.0- sample of this...
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A unknown gas has a density of 2.77 g/L at STP. What is the molecular weight (in g/mol) of this unknown gas?
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Answer to six significant figures. A 15.0 ml sample of nitric acid solution is titrated with a 0.960 M barium hydroxide until the end point. Based on the titration data, the concentration of nitric acid is de- termined to be 3.18 M. Calculate the volume in milliliters of barium hydroxide...
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A pure sample of barium hydroxide of mass 6.1 g was dissolved and diluted to the mark in a 250 mL volumetric flask. It was found that 12.76 mL of this solution was needed to reach the stoichiometric point in a titration of 20.6 mL of a nitric acid solution. Calculate the molarity of the...
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A copper cube measuring 1.60 cm on edge and an aluminum cube measuring 1.61 cm on edge are both heated to 55.3 C and submerged in 100.0 mL of water at 22.1 C. What is the final temperature of the water when equilibrium is reached? (Assume a density of 0.998 g/mL for water.)
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15.0 moles of gas are in a 6.00 tank at 21.7. Calculate the difference in pressure between methane and an ideal gas under these conditions. The van der Waals constants for methane are and .
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Sample Questions
- 1. For organic chemistry, what is a concerted shift? How do things like acids or heat affect them? What other factors affect them?
- 2. Which of the following reactions is an acid-base neutralization reaction? Why are the rest of the answers incorrect?
- A. AgNo3 (aq) + NaI (aq) --> AgI (s) + NaNO3 (aq)
- B. S8(s) + 8O2 (g) --> 8SO2(g)
- C. Na3PO4 (s) + 2H2O (l) --> H2 (g) + 2NaOH (aq)
- D. Ca (OH)2 (aq) + 2HI (aq) --> CaI2(aq) + 2H2O (l)
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