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)

the correct answer is boyle

answer: the value of enthalpy change will be -152.80 kj.

solution:

pressure = 1atm , temperature = = 298 k

given that pressure and temperature are same in both gases , the number of moles of both gases can be determined by the ideal gas equation.

according to reaction 3 moles no are reacting with 1 mol of ,then 0.49 mol of no will react with moles of ozone that is 0.16 moles of ozone. since, no is limiting reagent and is an excessive reagent.

enthalpy change for the reaction between the given volumes of the gases is :

i think it's c. if you look search electronic symbol on google and then click on wiki it shows you a