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Chemistry

10th Edition
Steven S. Zumdahl + 2 others
ISBN: 9781305957404

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BuyFindarrow_forward

Chemistry

10th Edition
Steven S. Zumdahl + 2 others
ISBN: 9781305957404
Textbook Problem

You find a compound composed only of element X and chlorine. and you know that the compound is 13.10% X by mass. Each molecule of the compound contains six times as many chlorine atoms as X atoms. What is element X?

Interpretation Introduction

Interpretation:

The unknown element X present in Chlorine containing compound should be identified.

Concept introduction:

Mass percent:

The ratio between mass of the analyte and total mass of the compound is multiplied with hundred to give percent mass of the analyte in taken mass of compound.

=MassofanlyteTotalmassofcompound×100

Mole:

The ratio between mass of the sample taken and molar mass of compound to give a mole of the analyte present in taken gram of sample.

Mole=MassMolarmass

Explanation

Consider the mass of the taken sample is 100g and the compound consists of element X and Chlorine only.

Hence the element X present in 13.10g and Chlorine present in 86.9 g

Mole of Chlorine present in 86.9 gis,

=86.9g35.453g=2.45moles

To identify the unknown element X,

2.45moles=X(13.10z)Cl2.45moles

The compound contains six times as many chlorine atoms as X atoms.

2.45moles=6×13

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