Question

How many significant digits
8.3* 10 to power of-1 mL
11500kg
0.006100J
-6.0* 10 to power of-2 kJmol

Answer 1

The number of significant digits in each value is as follows:

8.3*10^-1 mL: 2 significant digits (8 and 3)
11500 kg: 4 significant digits (1, 1, 5, and 0)
0.006100 J: 4 significant digits (6, 1, 0, and 0)
-6.0*10^-2 kJ/mol: 2 significant digits (6 and 0)