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Introductory Chemistry: A Foundati...

9th Edition
Steven S. Zumdahl + 1 other
ISBN: 9781337399425

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BuyFindarrow_forward

Introductory Chemistry: A Foundati...

9th Edition
Steven S. Zumdahl + 1 other
ISBN: 9781337399425
Textbook Problem
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A sample of an iron alloy contains 92.1 g Fe. 2.59 g C. and

Cr. Calculate the percent by mass of each component present in the alloy sample.

Interpretation Introduction

Interpretation:

The percent by mass of each component present in the alloy sample is to be calculated.

Concept Introduction:

Solution is composed of solute and solvent particles. Solute particles are always present in a lower amount as compared to the amount of the solvent in the solution. The solution can be concentrated and diluted on the basis of number of moles of solute present in the particular amount of the solvent. Mass percent is used to describe the quantity of a substance in the solution.

Explanation

The total mass of alloy (in grams) is calculated by the formula,

Totalmass=MassofFe+MassofC+MassofCr

Substitute the values of masses of Fe, C and Cr in the above expression.

Totalmass=92.1g+2.59g+1.59g=96.28g

The percent by mass of Fe is calculated by the formula,

%ofFe=MassofFeTotalmass×100

Substitute the values of mass of Fe and total mass in the above expression.

%ofFe=92.1g96.28g×100=95.66%

Similarly,

The percent by mass of C is calculated by the formula,

%ofC=MassofCTotalmass×100

Substitute the values of mass of C and total mass in the above expression

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