stoich part 2 Flashcards
(10 cards)
Identify the limiting reagent and the volume of CO2 formed when 11 L CS2 reacts with 18 L O2 to produce CO2 gas and SO2 gas at STP.
O2; 6.0 L CO2
What is the maximum number of grams of PH3 that can be formed when 6.2 g of phosphorus reacts with 4.0 g of hydrogen to form PH3?
6.8 g
Which statement is true if 12 mol CO and 12 mol Fe2O3 are allowed to react?
The limiting reagent is CO and 8.0 mol Fe will be formed.
Which of the following is NOT true about “yield”?
The actual yield may be different from the theoretical yield because insufficient limiting reagent was used.
Lead nitrate can be decomposed by heating. What is the percent yield of the decomposition reaction if 9.9 g Pb(NO3)2 are heated to give 5.5 g of PbO?
82%
Hydrogen gas is produced when zinc reacts with hydrochloric acid. If the actual yield of this reaction is 85%, how many grams of zinc are needed to produce 112 L of H2 at STP?
380 g
In a particular reaction between copper metal and silver nitrate, 12.7 g Cu produced 38.1 g Ag. What is the percent yield of silver in this reaction?
88.2%
If 5.0 g of H2 are reacted with excess CO, how many grams of CH3OH are produced, based on a yield of 86%? CO(g) + 2H2(g) sa013-4.jpg CH3OH(l)
34.4 g
For the reaction 2Na(s) + Cl2(g) 2NaCl(s), identify the limiting reagent and how many grams of NaCl could be produced from 103.0 g of Na and 13.0 L of Cl2 (at STP)?
67.9 g
A 500-g sample of Al2(SO4)3 is reacted with 450 g of Ca(OH)2. A total of 596 g of CaSO4 is produced. What is the limiting reagent in this reaction, and how many moles of excess reagent are unreacted?
1.69mol
