Answered: (MW = 44 g/mole) was collected on…

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 0.6599-g sample of impure magnesite, MgCO₃ (MW = 84 g/mole), was decomposed with HCl; the liberated CO₂(MW = 44 g/mole) was collected on absorbent and found to weigh 0.1673-g. Calculate the percentage of magnesium (MW = 24 g/mole) in the sample.

MgCO₃(s) + 2 HCl (aq) →MgCl₂ (aq) + CO₂ (g) + H₂O(l)

Weight of pure magnesium in the sample is

a. 0.1825 g

b. 0.0913 g

c. 0.3194 g

d. 0.0456 g

Percentage of magnesium carbonate in the sample is

a. 24.20%

b. 27.66%

c. 48.40%

d. 96.80%

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