v = 4/3 * π * d^3 / 8
calculate the volume , it will be in cm^3
... 1000 cm^3 = 1 L
find the mass of He in the balloon
... divide by the molar mass of He to find the moles of He
multiply the moles by Avogadro's number to find the number of atoms
How many atoms of He can a balloon that has a 21 cm diameter hold? The density of Helium is 1.18 g/L.
(Assume the balloon is a sphere).
1 answer
1 answer