Chemistry: Atoms First V1
Chemistry: Atoms First V1
1st Edition
ISBN: 9781259383120
Author: Burdge
Publisher: McGraw Hill Custom
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Chapter 1, Problem 1.43QP

(a)

Interpretation Introduction

Interpretation:

For the given set of calculations the significant figures and their correct units has to be given.

Concept introduction:

Significant figures: The digits having a meaning in a given number are called as significant figures.

Significant figures – calculation rules

  • Significant figure is a non-zero number (4443.2 has five significant figures)
  • Zero’s placement in between non-zero number are significant figures (40005 has five significant figures).
  • Zero’s before the non-zero number are not significant number (0.00040005 has five significant figures).
  • Zero’s after the non-zero number are significant in case of that number contains decimal point (4.5000 has five significant figures).
  • Zero’s after the non-zero number may or may not be a significant figure in case of that number does not have a decimal point (500 may have 1, 2 or 3 significant figures).  In this cases use scientific notation to avoid ambiguity.

To give: The significant figures and correct unit for the given operation

(b)

Interpretation Introduction

Interpretation:

For the given set of calculations the significant figures and their correct units has to be given.

Concept introduction:

Significant figures: The digits having a meaning in a given number are called as significant figures.

Significant figures – calculation rules

  • Significant figure is a non-zero number (4443.2 has five significant figures)
  • Zero’s placement in between non-zero number are significant figures (40005 has five significant figures).
  • Zero’s before the non-zero number are not significant number (0.00040005 has five significant figures).
  • Zero’s after the non-zero number are significant in case of that number contains decimal point (4.5000 has five significant figures).
  • Zero’s after the non-zero number may or may not be a significant figure in case of that number does not have a decimal point (500 may have 1, 2 or 3 significant figures).  In this cases use scientific notation to avoid ambiguity.

To give: The significant figures and correct unit for the given operation

(c)

Interpretation Introduction

Interpretation:

For the given set of calculations the significant figures and their correct units has to be given.

Concept introduction:

Significant figures: The digits having a meaning in a given number are called as significant figures.

Significant figures – calculation rules

  • Significant figure is a non-zero number (4443.2 has five significant figures)
  • Zero’s placement in between non-zero number are significant figures (40005 has five significant figures).
  • Zero’s before the non-zero number are not significant number (0.00040005 has five significant figures).
  • Zero’s after the non-zero number are significant in case of that number contains decimal point (4.5000 has five significant figures).
  • Zero’s after the non-zero number may or may not be a significant figure in case of that number does not have a decimal point (500 may have 1, 2 or 3 significant figures).  In this cases use scientific notation to avoid ambiguity.

To give: The significant figures and correct unit for the given operation

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Express the answers to the following calculations inscientific notation:(a) 145.75 + (2.3 × 10−1)(b) 79,500 ÷ (2.5 × 102)(c) (7.0 × 10−3 ) − (8.0 × 10−4) (d) (1.0 × 104 ) × (9.9 × 106)
Perform the following arithmetic operations, and report the result to the proper number of significant figures:(a) 105.5 L + 10.65 L, (b) 81.058 m − 0.35 m, (c) 3.801 × 1021 atoms + 1.228 × 1019 atoms, (d) 1.255 dm × 25 dm, (e) 139 g ÷ 275.55 mL.
Measurements have shown that the concentration of salt in seawater is  35.5·gL−1. Calculate the volume in liters of seawater that must be evaporated to recover  0.0250kg of salt. Round your answer to  3 significant digits.

Chapter 1 Solutions

Chemistry: Atoms First V1

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