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)

e

explanation:

the volume increases

percent abundance for cu-63 can be shown as:

63 x + 65 (1-x) = 62.9296

65 - 62.9296 = 2 x

x = 1.035

thus, percent abundance for cu-63 is 1.035

percent abundance for cu-65 can be shown as:

63 x + 65 (1-x) = 64.9278

65 - 64.9278 = 2 x

x = 0.0361

thus, percent abundance for cu-63 is 0.0361

the mass spectrum of cu-63 showing the intense peak as, this isotope is found in nature more abundantly around 92.38 % in comparison to cu-65 which is found 62.58 % naturally

answer: cellular respiration takes in food and uses it to create atp, a chemical which the cell uses for energy. usually, this process uses oxygen, and is called aerobic respiration. it has four stages known as glycolysis, link reaction, the krebs cycle, and the electron transport chain.