how do you find the mass of a sphere
Volume x density => 4/3(pi)(r)3 x density
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Surface area of a sphere = 4*pi*radius2
Surface area of a sphere = 4*pi*radius2
The volume of a sphere is given by the formula V =⁴⁄ ₃πr3The volume of a sphere with radius 7cm = ⁴⁄ ₃π73 = 1436.76 cm3 (to 2 dps)
The diameter of the sphere is 19.6 cm.
Use your volume formula and your radius to find volume. Next use the equation d=m/v or m=dv to find your mass of copper. Use your mass, atomic weight of copper, and avagadro's number to figure out your atoms.