Moles of water. Physics. Help

A cylindrical glass of water (H2O) has a radius of 4.48 cm and a height of 12.6 cm. The density of water is 1.00 g/cm3. How many moles of water molecules are contained in the glass? Do not enter unit.

Water has a molecular mass of 18g/mol (not exact but should suffice)
since 1gram of water goes into 1cc (cubic centimeter) water takes up 18cc per mole.

to get the volume of glass:

3.14 * 4.48^2) * 12.6

and divide that volume by 18 to get moles of water.

(3.14*(4.48^2)*12.6)/18

Water(H20)has a molecular mass of 18.01528 u or ~18g/mol;

Volume of Cylinder(Glass):
V = B*h(Base Area*Height)
V = π*r^2*h;where r = raidius and h = height;
V = π*4.48^2*12.6
V = π*20,0704*12.6
V = π*252,88704
V = 252,88704π cm^3(cubic centimetres)

We have to divide the volume of the cylinder by 18 to get the moles of water:
Moles = V/18
Moles = 252,88704π/18
Moles = 794,065306/18
Moles = 44,1147392
Moles = ~44

Therefore,there are approximately ''44'' moles of water. :)