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Chemistry & Chemical Reactivity

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

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BuyFindarrow_forward

Chemistry & Chemical Reactivity

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

You are asked to identify an unknown liquid that is known to be one of the liquids listed below. You pipet a 3.50-mL sample into a beaker. The empty beaker had a mass of 12.20 g. and the beaker plus the liquid weighed 16.08 g.

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(a) Calculate the density and identify the unknown.

(b) If you were able to measure the volume to only two significant figures (that is, 3.5 mL, not 3.50 mL), will the results be sufficiently accurate to identify the unknown? Explain

(a)

Interpretation Introduction

Interpretation:

The density has to be calculated and the unknown substance has to be identified.

Concept Introduction:

Density: A measurement of mass per unit volume.

  Density = Mass volume

Explanation

The density is calculated as,

  Density = Mass volumeGiven:Volume =3.50ml ; mass of empty beaker = 12.20 g;                                          mass of beaker + liquid = 16

(b)

Interpretation Introduction

Interpretation:

The explanation has to be given about the results that might be sufficiently accurate to identify the unknown.

Concept Introduction:

Density: A measurement of mass per unit volume.

  Density = Mass volume

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