Alexus wanted to buy a gold mine. She had a choice of two mines. Mine A contained Au(OH)2 and mine B contained AuO a. determine molar mass of Au(OH)2 to nearest 0.1 4 points

b. determine percent gold 2 points

c. determine molar mass of AuO to nearest 0.1 4 points

d. determine percent gold 2 points

e. Which mine would give Alexus the biggest percentage by mass of gold? 2 points

b. If Alexus was able to remove 1.50 x103 kg of gold ore from the best mine, how many kilograms of pure gold would she obtain? ( 5 points)

c. Gold sells on the open market at $57,150 a kilogram. How much would Alexus gross? ( 5 points)