# Chapter 1, Problem 39E

### Bundle: Chemistry, Loose-Leaf Vers...

10th Edition
Steven S. Zumdahl + 2 others
ISBN: 9781337537933

Chapter
Section

### Bundle: Chemistry, Loose-Leaf Vers...

10th Edition
Steven S. Zumdahl + 2 others
ISBN: 9781337537933

(a)

Interpretation Introduction

Interpretation:

For the given set of calculations the answer has to be given in appropriate number of significant figures.

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)
• Zeros placement in between non-zero number are significant figures (40005 has five significant figures).
• Zeros before the non-zero number are not significant number (0.00040005 has five significant figures).
• Zeros after the non-zero number are significant in case of that number contains decimal point (4.5000 has five significant figures).
• Zeros 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.
• The placement of decimal at the trailing zero is indicates the zero is significant (550. has three significant figures).

## Explanation

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