Calculate the number of moles (of molecules) in the following samples. 

(A) 10.32 g H20 

0.5729 mole 

(B) 16.54 g benzene, 

C5H6 X mole 

(C) 36.12 g ethyl alcohol, 

C2H5OH 0.784 mole 

(D) 5.88x1024 molecules CO2 X mole 

(E) A sample of Co, that contains 6.10x1022 o atoms X mole 

 What is the molar mass of cholesterol if 0.572 mol weighs 221.19 g? Hint: What is the definition of molar mass?