# Shared Flashcard Set

## Details

Practice Test #2
Stiochiometry
8
Chemistry
10/12/2008

Term
 How many H atoms are in 39.6g sample (NH4)2SO4?
Definition
 1.44 x 1023 H atoms
Term
 How many grams of Copper can be obtained from 10.0g sample of Cu2S?
Definition
 7.99g Cu
Term
 What mass of CH4 is required to react completely with a 45.2g sample of O2? CH4 + 2O2 -> CO2 + 2H2O
Definition
 11.3 g CH4
Term
 A 15.6g sample of C6H6 is mixed with excess HNO3 and 18.0g of C6H5NO2 is isolated. What is the percent yield of the product? C6H6 + HNO3 -> C6H5NO2 + H2O
Definition
 73.2%
Term
 The percent yield for the synethesis of phosphorous pentachloride is 85.0% What mass of PCl5 would be expected from the reaction of a 28.5g sample of PCl3 with excess chloride? PCl3 + Cl2 -> PCl5
Definition
 36.7g PCl5
Term
 What mass of CO2 is produced whan a 8.0g sample of CH4 reacts with a 48.0g sample of O2 in the following equation? CH4 + 2O2 -> CO2 + 2H2O
Definition
 22g CO2
Term
 Au(OH)3 is used to electroplate gold onto other metals. If a 20.0g sample of KAuCl4 is mixed with a 25.0g sample of Na2CO3 how many grams of Au(OH)3 will theroretically be produced?  2KAuCl4 + 3Na2CO3 + 3H2O -> 2Au(OH)3 + 6NaCl + 2KCl + 3CO2
Definition
 13g Au(OH)3
Term
 Water can be electrically decomposed to produce hydrogen and oxygen gases. Calculate the mass of water decomposed to produce 84.2g of hydrogen chloride, when hydrogen gas is combined with chlorine gas per the following series of reactions. 2H2O -> 2H2 + O2 H2 + Cl2 -> 2HCl
Definition
 20.8g H2O
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