Chapter 1, Problem 57RGQ

### Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074

Chapter
Section

### Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074
Textbook Problem

# You have an irregularly shaped piece of an unknown metal. To identify it, you determine its density and then compare this value with known values that you look up in the chemistry library. The mass of the metal is 74.122 g. Because of the irregular shape, you measure the volume by submerging the metal in water in a graduated cylinder. When you do this, the water level in the cylinder rises from 28.2 mL to 36.7 mL.(a) What is the density of the metal? (Use the correct number of significant figures in your answer.)(b) The unknown is one of the seven metals listed below. Isis possible to identify the metal based on the density you have calculated? Explain.

(a)

Interpretation Introduction

Interpretation:

The density of the metal used has to be calculated.

Concept Introduction:

Density: A measurement of mass per unit volume.

Density = Mass volume

Explanation

The density of the metal used is calculated as,

Â Â DensityÂ =Â MassÂ volumeGiven:â€‰VolumeÂ =â€‰(36.7Â -Â 28.2)â€‰mlÂ =Â 8.5Â mlÂ ;Â MassÂ ofÂ theÂ metalÂ =Â 74

(b)

Interpretation Introduction

Interpretation:

The explanation has to be given for identifying the density of the metal based on the calculated density.

Concept Introduction:

Density: A measurement of mass per unit volume.

Density = Mass volume

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