Question

3-1. How many significant figures are there in the following numbers?

(a) 1.903 0

(b)0.0391 0

(c) $\mathbf{1}\mathbf{.}\mathbf{40}\mathbf{\times }{\mathbf{10}}^{\mathbf{4}}$

Short answer

1. The significant figures of 1.903 0 is 5
2. The significant figures of 0.0391 0 is 5
3. The significant figures of$1.40\times {10}^4$is 3

Step-by-step solution

The significant figures of 1.903

(a)

The question is given 1.903 0.

So the significant figures are (1,9,0,3,0)

As all zeros after decimal are also significant along with all non-zero numbers

The significant figures of 0.0391 0

(b)

The question is given 0.0391 0

So the significant figures are (0, 3, 9, 1, 0)

As before decimal is non-significant if it does not have any non-zero number before it.

The significant figures of 1.40×104

(c)

The question is given$1.40\times {10}^4$

So the significant figures are (1, 4, 0)