A stack of ten 3.5 in diskettes is 34 mm high. How many diskettes does it take to make a stack 100 yards high?

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)

The excretory system,need answers for all: )

The volume of an unknown substance in a sealed glass jar is 50 milliliters. the volume of the jar is 200 milliliters. which state of matter could the substance be?