Answered: Calculate the mass percent of each…

Chemistry: Principles and Practice

3rd Edition

ISBN:9780534420123

Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer

Publisher:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer

Chapter3: Equation, The Mole, And Chemical Formulas

Section: Chapter Questions

Problem 3.146QE

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Question

Calculate the mass percent of each element in ZnCI₂?

Expert Solution

Step 1

$M a s s p e r c e n t o f e l e m e n t = \frac{M a s s o f e l e m e n t i n t h e c o m p o u n d}{M o l e c u l a r m a s s o f c o m p o u n d} X 100$

Atomic mas of Zn = 65.3

Atomic mass of Cl = 35.5

In ZnCl₂ there are two chlorine atoms are present, So the mass of Cl in ZnCl₂ is 71g.

Step 2

$M a s s p e r c e n t o f Z n = \frac{M a s s o f Z n }{M o l e c u l a r m a s s o f Z n C l_{2}} X 100 = \frac{65.3}{136.3} X 100 = 47.9 %$

$M a s s p e r c e n t o f C h l o r i n e = \frac{M a s s o f C h l o r i n e }{m o l e c u l a r m a s s o f Z n C l_{2}} X 100 = \frac{71}{136.3} X 100 = 52.09 %$

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