Question

How many significant digits are there in
51200kg
8.5*10 to power of-2 mL
-1.0* 10 to power of-2 kJmol
0.007800J

Answer 1

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

51200kg - 5 significant digits
8.5*10^-2 mL - 2 significant digits
-1.0*10^-2 kJ/mol - 2 significant digits
0.007800J - 4 significant digits