1 ) A solution of ammonia and water contains 1.601025 water molecules and 8.901024 ammonia molecules. How many total hydrogen atoms are in this solution 2) In Millikan's experiment, the charge on each drop of oil was measured in coulombs. Imagine the same experiment, but with charges measured in a fictitious unit called a zeet ( Z ). Drop Charge ( Z ) A 2.801014 B 5.041014 C 5.601014 D 6.161014 E 8.401014 What is the charge on an electron in zeets? Express your answer in zeets using two significant figures. 3) Common brass is a copper and zinc alloy containing 37.0% zinc by mass and having a density of 8.48 g/cm3 . A fitting composed of common brass has a total volume of 126.5 cm3 How many atoms of copper does the fitting contain? How many atoms of zinc does the fitting contain?