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A piece of a polypropylene rope (used for water skiing) floats on water, whereas a terephthalate polymer from a soda bottle sinks in water. What is the order of increasing density of these substances? (a) water < polypropylene < soda bottle plastic (b) polypropylene < water < soda bottle plastic (c) polypropylene < soda bottle plastic < water (d) soda bottle plastic < polypropylene < water (e) soda bottle plastic < water < polypropylene

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Chemistry & Chemical Reactivity

9th Edition
John C. Kotz + 3 others
Publisher: Cengage Learning
ISBN: 9781133949640

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Chapter
Section
BuyFindarrow_forward

Chemistry & Chemical Reactivity

9th Edition
John C. Kotz + 3 others
Publisher: Cengage Learning
ISBN: 9781133949640
Chapter 1.6, Problem 2RC
Textbook Problem
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A piece of a polypropylene rope (used for water skiing) floats on water, whereas a terephthalate polymer from a soda bottle sinks in water. What is the order of increasing density of these substances?

  1. (a) water < polypropylene < soda bottle plastic
  2. (b) polypropylene < water < soda bottle plastic
  3. (c) polypropylene < soda bottle plastic < water
  4. (d) soda bottle plastic < polypropylene < water
  5. (e) soda bottle plastic < water < polypropylene

Interpretation Introduction

Interpretation: The increasing order of density of the given substances to be identified.

Concept introduction:

Physical property: Properties which can be observed and measured without changing the composition of a substance are called physical properties. The property differs in terms of their color, appearance, and state. Generally, Physical properties allow us to classify and identify substances.

Physical properties are Color, State of matter, Melting point, Boiling point, Density, Solubility, Electric conductivity, Malleability, Ductility, and Viscosity.

Density: It is defined as the ratio between mass and volume or mass per unit volume. It is a measure of how much stuff an object has in a unit volume.

Explanation of Solution

Reason for correct option:

b) As per the given incident where the polypropylene rope floats on water, soda bottle sinks in water, the polypropylene rope lies on the top of all and be the least dense and the soda bottle plastic lies bottom of the water will be the most dense and water lies in between. Therefore, increasing order of density can be concluded as Polypropylene<Water<Sodabottleplastic.

Hence the correct option is option (c).

Reason for incorrect options:

  • Option a) – Water<Polypropylene<Sodabottleplastic.
  • Option b) – Polypropylene<Water<Sodabottleplastic

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Chemistry & Chemical Reactivity
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