Question

2.9 How many significant figures are in each of the following? a. 11.005 g b. 0.000 32 m c. 36 000 000 km d. 1.80 X 104 kg e. 0.8250 L f. 30.0°C How many significant figures are in each of the following? a. 20.60 mL b. 1036.48 kg c. 4.00 m d. 20.8 °C e. 60 800 000 g f. 5.0 x 10-3L 2.18 2.10

Answer 1

The rules are-

All the nonzero digits are significant.

All zeros between two nonzero digits are significant.

All the zeros on the left of the first nonzero digit are insignificant.

If there is no decimal, then the all the zeros on the right of the last nonzero digit are insignificant.

If there is decimal, then all the zeros on the right of the decimal point are significant if there is atleast on nonzero digit before.

Based on these rules

2.9)

a) 5

b) 2

c) 2

d) 3

e) 4

f) 3

2.10

a) 4

b) 6

c) 3

d) 3

e) 3

f) 2

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