Answered: Unknown elemental metal was reacted…

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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n Unknown elemental metal was reacted with Hydrochloric Acid. It was determined that this reaction evolved Hydrogen gas and left the metal in solution in the 2+ oxidation state. The Unknown metal was then subjected to the same test as Magnesium in the “Molar Mass of Magnesium” lab. After some adjustments to get the volume of gas collected in the right range, the following results were obtained:

Mass of Metal used = 0.3682 g

P (atmospheric) = 761.1 mm Hg

Temperature of gas = 21.6 degrees C

Volume of gas collected = 67.5 ml

Difference in height of solution levels in the buret and beaker = 163.0mm

Vapour pressure of H20 at gas temperature = 19.349 mm Hg

Some Constants:

R = 0.0820575 L*Atm/mol/K = 62.3637 L*mmHg/mol/K

dsolution = 1.00g/ml

dHg = 13.6 g/ml

From this data, calculate and report the molar mass of the unknown metal with correct significant figures and unit

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