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ChemistryChemistry for Engineering Students4th Edition
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3.77 Answer each of the following questions. Note that none of them should require difficult calculations. (a) How many molecules are present in 1 mole of octane (C 4 H 1 8 )? (b) How many moles of fluorine atoms are present in 4 moles of C 2 F 6 ? (c) What is the approximate mass (to the nearest gram) of 3 × 10 2 3 carbon atoms?

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Chemistry for Engineering Students

4th Edition
Lawrence S. Brown + 1 other
Publisher: Cengage Learning
ISBN: 9781337398909

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Chemistry for Engineering Students

4th Edition
Lawrence S. Brown + 1 other
Publisher: Cengage Learning
ISBN: 9781337398909
Chapter 3, Problem 3.77PAE
Textbook Problem
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3.77 Answer each of the following questions. Note that none of

them should require difficult calculations.

(a) How many molecules are present in 1 mole of octane

(C4H18)?

(b) How many moles of fluorine atoms are present in 4

moles of C2F6?

(c) What is the approximate mass (to the nearest gram) of

3 × 1023 carbon atoms?

(a)

Interpretation Introduction

To determine:

The number of molecules present in 1 mole of octane.

Explanation of Solution

A mole is defined as 6.022×1023 particles of a substance. The number 6.022×10

(b)

Interpretation Introduction

To determine: The number of moles of fluorine atoms in 4 moles of C2F6.

(c)

Interpretation Introduction

To determine:

The approximate mass (to the nearest gram) of 3×1023 carbon atoms.

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