Question

Significant Figures- Questions For the following measurements, underline the digits that are known with certainty and highlight in color the digits that are estimated. If a number is ambiguous, that is, the number of significant figures is uncertain, state so. In each case, explain your reasoning. 3) a) 4.35 ml b) 0.009340 g c) 3400 km d) 1.38 x 103 m/s

Answer 1

The number of significant figures is defined as the number of digits that are known with certainty

(a) answered already

(b) 0.009340

here 0.00 is not significant , hence is an estimate

9340 is significant and is known with certainty.

(c) 3400

Here 00 are an estimate but 34 is significant

here we have only two significant figures which are 3 and 4.

(d)  1.38e3

Here, we have three significant figures, 1, 3 and 8