
help please..
pure gold can be made into extremley thin sheets called gold leaf. suppose that 50. kg of gold is made into gold leaf having an area of 3620 m^2. The density of gold is 19.3 g/cm^3
a. how thick in micrometers is the gold leaf?
b. a gold atom has a radius of 1.44E10 m, how many atoms thick is the gold leaf?
thanks in advance!
Ric

volume = (mass)(density)
volume = (area)(thickness)
so ...
(mass)(density) = (area)(thickness)
solve for thickness.
part 2 ...
# of atoms = (thickness)/(diameter of a gold atom)
remember that diameter = 2(radius)