Stoichiometry: Problem Sheet 2
Name ______________________ Period ___ Date ___/___/___
7 ( Stoichiometry
STOICHIOMETRY WS #2 – 3-STEP PROBLEMS
Directions: Solve each of the following problems. Show your work, including “given” and “find”, to earn full credit.
1. ___ CaCl2 + ___ AgNO3 ( ___ Ca(NO3)2 + ___ AgCl
How many grams of AgCl are produced when 45 g of CaCl2 react with excess AgNO3?
2. ___ CuO + ___ H2 ( ___ Cu + ___ H2O
At STP, how many liters of H2 are needed to react with 88 g of CuO?
3. ___ Na + ___ H2O ( ___ NaOH + ___ H2
If 3.00 liters of H2 (at STP) are produced in the above reaction, what mass of sodium was used?
4. ___ CH4 + ___ O2 ( ___ CO2 + ___ H2O
What volume of CH4 (at STP) is needed to completely react with 500. liters of O2?
5. ___ CS2 + ___ O2 ( ___ CO2 + ___ SO2
How many grams of CS2 will react with 4.21 x 1019 molecules of O2?
6. ___ C2H6 ( ___ C2H4 + ___ H2
If 5.76 x 1028 molecules of C2H4 are broken down, what volume of H2 gas is produced at STP?
7. ___ Fe + ___ H2O ( ___ Fe3O4 + ___ H2
If 67.8 L of H2 are produced at STP, how many atoms of Fe were used in the reaction?
8. ___ KClO3 ( ___ KCl + ___ O2
If 8.65 x 1025 formula units of KCl are produced, what mass of O2 is produced?
9. ___ NaI + ___ Cl2 ( ___ NaCl + ___ I2
How many molecules of I2 are produced if 546 g of Cl2 are reacted?
10. ___ Cu + ___ AgNO3 ( ___ Cu(NO3)2 + ___ Ag
How many grams of Ag will be produced if 86 g of Cu are used?
11. ___ (NH4)2SO4 + ___ Ca(OH)2 ( ___ CaSO4 + ___ NH3 + ___ H2O
At STP, how many L of NH3 are produced by using 26.0 g of Ca(OH)2?
12. ___ NaCl + ___ H2SO4 ( ___ HCl + ___ Na2SO4
If 359 g of NaCl are consumed in the reaction, how many formula units of Na2SO4 are produced?
13. ___ AgC2H3O2 + ___ Na3PO4 ( ___ Ag3PO4 + ___ NaC2H3O2
What mass of AgC2H3O2 will react with 4.77 x 1026 formula units of Na3PO4?
14. ___ HgO ( ___ Hg + ___ O2
What mass of HgO is required to produce 812 liters of O2 (at STP)?
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