I Review I Constants A pure gold ring and pure silver ring have a total mass of 15.2 g. The two rings are heated to 75.2 °C and dropped into a 14.9 mL of water at 20.4 C. When equilibrium is reached, the temperature of the water is 22.6 °C. Part A What is the mass of gold ring? (Assume a density of 0.998 g/mL for water.) Express your answer to two significant figures and include the appropriate units. HA ? MAu = Value Units Submit Request Answer Part B What is the mass of silver ring? (Assume a density of 0.998 g/mL for water.) Express your answer to two significant figures and include the appropriate units. HA mag = Value Units Submit Request Answer Provide Feedback

I Review I Constants A pure gold ring and pure silver ring have a total mass of 15.2 g. The two rings are heated to 75.2 °C and dropped into a 14.9 mL of water at 20.4 C. When equilibrium is reached, the temperature of the water is 22.6 °C. Part A What is the mass of gold ring? (Assume a density of 0.998 g/mL for water.) Express your answer to two significant figures and include the appropriate units. HA ? MAu = Value Units Submit Request Answer Part B What is the mass of silver ring? (Assume a density of 0.998 g/mL for water.) Express your answer to two significant figures and include the appropriate units. HA mag = Value Units Submit Request Answer Provide Feedback

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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Use the References to access important values if needed for this question. When a solid dissolves in water, heat may be evolved or absorbed. The heat of dissolution (dissolving) can be determined using a coffee cup calorimeter. Thermometer Cardboard or In the laboratory a general chemistry student finds that when 14.72 g of BaBr2(s) are Styrofoam lid dissolved in 101.00 g of water, the temperature of the solution increases from 22.80 to 25.27 °C. The heat capacity of the calorimeter (sometimes referred to as the calorimeter constant) was determined in a separate experiment to be 1.82 J/°C. Nested Styrofoam cups Based on the student's observation, calculate the enthalpy of dissolution of BaBr2(s) in kJ/mol. Reaction occurs in solution. Assume the specific heat of the solution is equal to the specific heat of water. AHdissolution = kJ/mol
1) A 0.416 g sample of KCl is added to 56.5 g of water in a calorimeter. If the temperature decreases by 1.24°C, what is the approximate amount of heat (in J) involved in the dissolution of the KCl, assuming the heat capacity of the resulting solution is 4.18 J/g°C? _____ J 2) Is the reaction exothermic or endothermic?
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