Question

count the significant digits in each of these measurements: measurement number of significant digits 0.009300 j - 2.0×10⁻³ kj/mol 69400. kg 9.6×10⁻¹ ml

Explanation:

Step1: Recall significant - digit rules for 0.009300 J

Leading zeros are not significant, but trailing zeros after a non - zero digit and after a decimal point are significant.

Step2: Recall significant - digit rules for $-2.0\times10^{-3}$ kJ/mol

In scientific notation, the digits in the coefficient are significant.

Step3: Recall significant - digit rules for 69400. kg

The decimal point indicates that the trailing zeros are significant.

Step4: Recall significant - digit rules for $9.6\times10^{-1}$ mL

In scientific notation, the digits in the coefficient are significant.

Answer:

measurement	number of significant digits
$-2.0\times10^{-3}$ kJ/mol	2
69400. kg	5
$9.6\times10^{-1}$ mL	2