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Chapter 1: Q3. (page 17)

How many significant figures does the number 0.0078 have?

(a) 1.(b) 2.(c) 3.(d) 4.

Short Answer

Expert verified

The given number has two significant figures.

Step by step solution

01

Step 1. Significant figures

The given number is 0.0078.

The rules for determining the significant figures are as follows:

  • All non-zero numerical values are significant.
  • All the leading zeroes are not significant.
  • A zero lying between two non-zero digits is significant.
02

Step 2. Decimal places of significant figures

There are four decimal places in the representation 0.0078. And in the scientific notation, 7.8×10-3, there are two significant figures.

Thus, option (b) is the correct answer.

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