Determine the number of significant figures in the following measurements a. 34.50698 g
b. 30.00 mL
c. 0.0008 g
d. 125. 0 °C

a) 7

b) 4

c) 1

d) 4

Explanation:

Significant figures:

All non-zero digits are consider significant figures like 1, 2, 3, 4, 5, 6, 7, 8, 9.

Leading zeros are not consider as a significant figures. e.g. 0.03 in this number only one significant figure present which is 3.

Zero between the non zero digits are consider significant like 104 consist of three significant figures.

The zeros at the right side e.g 2400 are also significant. There are four significant figures are present.

A) 34.50698 g

In this measurement there are 7 significant figures.

B) 30.00 mL

There are 4 significant figures.

c) 0.0008 g

There is only one significant figure which is 8.

d) 125.0 °C

There are 4 significant figures.