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Stoichiometry Race

Join the exciting stoichiometry race with your partner to solve molar mass, moles, and composition problems. Show your work on the board to earn points and win bubble gum! Test your chemistry skills now.

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Stoichiometry Race

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  1. Stoichiometry Race

  2. Rules • You can only work with your partner • All your work must be shown on the white board • First team gets 3 points • Second team gets 2 points • Third team gets 1 point Team with the highest score gets bubble gum!

  3. Molar Mass Determine the molar mass for the following: CH3

  4. Molar Mass Determine the molar mass for the following: Pb(NO3)2

  5. Molar Mass Calculate the number of moles of 26.2 g of gold.

  6. Molar Mass Calculate the number of moles of 41.5 g of calcium.

  7. Mass-Moles • Calculate the mass of 3 moles of Fe?

  8. Moles-Mass • Calculate the number of grams of 7.5mol of Pb.

  9. Moles-Volume • What is the volume of 3 moles of Cl2?

  10. Volume-Moles • How many moles of 42L of CH4?

  11. Moles-Particles • How many molecules are in 5.3 moles of H2C2O4?

  12. Particles-Moles • How many moles is 7.8x1023 atoms of Cu?

  13. Percent Composition • Calculate the percent composition of copper in CuBr2

  14. Question 8 • Calculate the percent composition of carbon in C6H10O6

  15. Empirical Formula • Determine the empirical formula of a compound that has the following percent compositions: Na 83.12%, N 16.88%

  16. Empirical Fromula • Determine the empirical formula of a compound that has the following percent compositions: 65.02 % Pt, 2.02% H, 9.34% N, 23.63% Cl.

  17. Gram-gram Stoichiometry • How many grams CHCl3 is will be produced from 50.0 g CH4? CH4 + 3 Cl2 CHCl3 + 3 HCl • What will the percent yield be if the actual yield is 400g?

  18. Gram-gram stoichiometry • What mass in grams of sodium carbonate, Na2CO3 is produced if 50.0 g of sodium oxide, Na2O, are reacted with excess carbon monoxide, CO, according to the fol­lowing chemical equation? 2Na2O(s) + CO(g) Na2CO3(s) + 2 Na(s)

  19. Limiting reactant • The reaction between solid sodium and iron III oxide is one in a series of reactions that inflates an automobile airbag. Na + Fe2O3→ Na2O + Fe • If 100.0 g Na and 100 g of Fe2O3are used in this reaction determine the limiting reactant and the mass of iron produced.

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