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The formation of a precipitate is an indication of chemical reaction called a precipitation…

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Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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A group of minerals containing either sulfide or disulfide is collectively known as sulfide minerals. An example is realgar (As4S4), known as "ruby sulfur," characterized by its bright orange-red color. Another closely related sulfide mineral is orpiment (As2S3), which has a deep-yellow color. Which of the following laws of matter best describes the statements on sulfide minerals? Select one: O a. Law of conservation of matter O b. Law of definite proportions O c. Law of multiple proportions O d. Cannot be determined 37
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Expressing amounts of energy in different energy units is necessary to solve many chemistry problems. For practice, complete the following table. The Joule (J) is the SI unit of energy. 1 calorie (cal) = 4.184 J; 1 kcal = 1000 cal J kJ kcal 549 0.684 0.226
Carbon disulfide burns in air, producing carbon dioxide and sulfur dioxide.CS2 (l) + 3 O2 (g) → CO2 (g) + 2 SO2 (g) ; DH = -1077 kJWhat is DH for the following reaction?½ CO2 (g) + SO2 (g) → ½ CS2 (l) + 3/2 O2 (g)
1
Question 4!
A solution is made by mixing 260.0 mL of ethanol initially at 15.5 °C with 260.0 mL of water initially at 23.4 °C. What is the final temperature of the solution assuming that no heat is lost? The density of ethanol is 0.789 g/mL and the density of water is 1.00 g/mL. The specific heat of ethanol is 2.46 J/g.°C and the specific heat of water is 4.184 J/g.°C. Tf = °C
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It took 2.500 × 10³ J to raise the temperature of a sample of water from 16.7 °℃ to 36.3 °C. Convert 2.500 × 10³ J to calories. 2.500 × 10³ J = cal
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