Chapter 1, Problem 15RPS

### 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 can identify a metal by carefully determining its density (d). An unknown piece of metal, with a mass of 2.361 g is 2.35 cm long 1.34 cm wide, and 1.05 mm thick. Which of the following is the element?(a) nickel, d = 8.91 g/cm3’(b) titanium, d = 4.50 g/cm3(c) zinc, d = 7.14 g/cm3(d) tin. d = 7.23 g/cm3

Interpretation Introduction

Interpretation: The unknown element to be identified.

Concept Introduction:

Density: Is a characteristic property of a substance. The density of a substance is the relationship between the mass of the substance and how much space it takes up (volume).

Density = MassVolume

Explanation

Reason for true statements

â€‚Â CalculateÂ theÂ Density:Given:Â longÂ =Â 2.35Â cmÂ ;â€‰wideÂ =â€‰1.34â€‰cm;Â thickÂ (height)Â =Â 0.105Â cm;â€‰massÂ =â€‰2.361Â gVolumeâ€‰ofÂ theÂ ReactangleÂ =Â lÃ—wÃ—hÂ =Â 2.35Â Ã—Â 1.34Â Ã—Â 0.105Â =Â 0.330645Â cm3Known:Â densityÂ =MassVolumeWhereas,DensityÂ =MassVolumeÂ =Â 2

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