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3Zn + 2Au(OH)3 --> 2Au + 3Zn(OH)2
20 mole Zn will replace (2/3)x 20 mol Au (13.3 mol)
13.3 mol x 197 g/mol = 2627 g
2630 g Au

NaHCO3 + CH3COOH --> CO2 + H2O + CH3COONa
65.2 L x 2.68 g CO2/L = 174.7 g CO2
174.7 g / 44.01g/mol = 3.97 mol
3.97 mol NaHCO3 x 84.01 g/mol = 334 g NaHCO3
3.97 mol CH3COOH x 60.05 = 238 g CH3OOH
 
Gold can be recovered from sea water by reacting the water with an active metal such as zinc. Zinc displaces hold in sea water present in the form of gold(III) hydroxide. What mass of gold can be recored if 20 moles of zinc are available? 4417


How many grams of NaHCO3 and acetic acid, CH3COOH would be needed to inflate an airbag to a volume of 65.2 L? Carbon dioxide gas has a density of 2.68 g/l at room temperature. The other products are sodium acetate and water
 
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