A. Name and provide the formula mass of K2O. [1 Mark] B. What are the molecular formula and molecular mass of cortisone, a compound with 21 carbon atoms, 28 hydrogen atoms, and 5 oxygen atom in each molecule? Is the cortisone compound ionic or covalent? [2.5 Marks] C. Which would you expect to be a better conductor of electricity; water taken from an ocean or water taken from inland lake? Explain your choice. [1 Mark] D. The atomic mass of sodium is 22.99 and the atomic mass of chloride is 35.45, what is the percentage by mass of sodium in sodium chloride? [2 Marks] E. Which has the larger molecular mass, a molecule of vitamin C((C6H8O6) or a molecule of vitamin B6(C8H11NO3) ? [2 Marks] F. Consider an empty aluminium soft drink can with a mass of 16.5gm. [4 Marks] a. How many moles of aluminium atoms does it contain? b. How many individual aluminium atoms does it contain? G. Calculate the following: [6 Marks] a. How many moles of solute are in 2.5L of solution that has a concentration of 0.4M? b. How many grams of glucose (C6H12O6) would you need to prepare 2.5L of a glucose solution with a concentration of 0.4M ? c. How many liters of a 0.8M solution contain 6.0 moles of solute