3) An older English system of mass and vol =1 dram) (1 dram =3.888g ) (20 grains =1 scruple) ( scruples (20 grains =1 scruple) a) What is the mass of 1.0 scruple in grams. [1.3g] b) How many grains are in 1.0 gram? [15 grains] 4) An empty flask weighs 332.255g. When filled with 254.3mL of an unknown liquid, the flask and contents weigh 534.112g. What is the density of the unknown liquid? [0.7938 g/mL] 5) If there are 6.0221023 molecules in one mole of molecules and particular molecule weighs 4.651023g. How many moles are in a 12.00g sample of these molecules? [0.429 moles] 6) A 99g solid titanium sphere has a density of 4.5g/cm3. Find the radius of the sphere in inches. [0.68 in.]