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Solve Chemical Equations: Mass and Moles Calculations

Learn to balance chemical equations and calculate mass and moles of elements like antimony and carbon. Practice problems included.

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Solve Chemical Equations: Mass and Moles Calculations

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  1. Figure Out This Problem Pd. 5 GO!

  2. What’s it Asking? What mass of Sb is produced when 28.1 g of And 17.3 g of C react to form Sb and CO? Find the Equation

  3. Balance the Equation • What do you need to balance it? • 2C 2Sb 2CO • 6C 4Sb 6CO • 4C 4Sb 6CO Back to What’s it Asking? Balanced equation

  4. balanced equation: 6 4 6 NEXT

  5. Incorrect • Hint: Remember, you have Back to Question

  6. NEXT • How many Grams are in Sb4O6? • 217.76 • 503.04 • 583.04 • 137.76

  7. Incorrect • Hint: • Did you multiply the mass of Sb by 4? • Did you multiply the mass of O by 6? • Did you add the multiply mass of SB and O? Go back

  8. Now what? • Now that you have gotten the mass to be 583.04, How many moles are in Sb and Sb4O6? 583.04 Hint: Go back to balanced equation Balanced Equation Take a Guess

  9. How many moles? • A. 4 mol Sb & 6 mol Sb4O6 • B. 4 mol Sb & 1 mol Sb4O6 • C. 1 mol Sb & 4 mol Sb4O6

  10. Incorrect • You can tell the number of moles in something by the number in front of the element. Go back

  11. Time to move on. 4 583.04 1 • What’s the mass of Sb? • 118.71 • 207.20 • 121.76

  12. Incorrect • Sorry try again. • Look at your periodic table.

  13. Now put it all together. 4 121.76 583.04 1 Multiply 28.1 x 4 x 121.76 Then, divide it by 583.04 What do you get? ANSWER

  14. Answer: 4 121.76 583.04 1 = 23.47

  15. Now do it with C • How many Grams are in C? • 12.01 • 12.00 • 14.01

  16. Incorrect • Hint: • Try again. • Look at your periodic table Go back

  17. Now what? • Now that you have gotten the mass to be 12.01, How many moles are in Sb and C? 12.01 Hint: Go back to balanced equation Balanced Equation Take a Guess

  18. How many moles? • A. 4 mol Sb & 6 mol C • B. 4 mol Sb & 1 mol C • C. 1 mol Sb & 4 mol C Balanced equation

  19. Incorrect • You can tell the number of moles in something by the number in front of the element. Go back

  20. Time to move on. 4 12.01 6 • What’s the mass of Sb? • 118.71 • 207.20 • 121.76

  21. Incorrect • You just did it! • Take a look back at the last problem. Back to question

  22. Now put it all together. 4 121.76 12.01 6 Multiply 17.3 x 4 x 121.76 Then, multiply 12.01 x 6 Then divide your two answers What do you get? ANSWER

  23. Answer: 4 121.76 12.01 6 = 116.9 Limiting reactant?

  24. LIMITING REACTANT Sb4O6

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