Mass and energy screencasts

how many moles of water are in 1 cup?

stoichiometrically:

cup>g/mL>mL/cup>mol/g

this gets you moles

mathematically:

Mass (g)=Volume (mL)×Density (g/mL)

mass water=volume of the water*density of water

mass for water can be related to moles for water

can you outrun an alligator able to dash at 20mph if you can cover the 40 yard dash in 5 seconds?

lets find what 40 yards in 5 seconds is in mph.

relate to the alligator's speed

tera

10^12

giga

10^9

mega

10^6

kilo

10³

centi

10^-2

milli

10^-3

micro

10^-6

nano