7. How many significant figures are in the following numbers? a. 0.0120350
b. 10.020
c. 12
d. 3.40 x 103

Explain why pure hydrogen cyanide does not conduct electricity, but become a conductor when it is dissolved in water? (at room temp, pure hcn exists as a volatile liquid)

How many mmols of tris-hcl are there in 100 ml of a 100 mm tris-hcl buffer solution at ph 8.1? note that the 100 mm refers to the sum of tris and tris-hcl concentrations?

Why are people not able to skip a dive to the deepest part of the ocean