1. One drop of water has a volume of 0.50mL. Assuming the density of
water is 1.00g/cm3, how many water molecules are contained in 1 drop of
water?
2. A cylindrical glass tube 15.0 cm in length is filled with ethanol. The
mass of ethanol needed to fill the tube is found to be 9.64 g. Calculate the
inner diameter of the tube in centimeters. The density of ethanol is
0.789g/mL.