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Name__________________________________ Period_______ PT #_____ Clicker #_____ The Mole Practice Quiz True/False. If False Change the underlined portion so the answer is true 1. _____ Avogadro’s number refers to the number of particles in one gram of a substance. 2. _____ An element’s molar mass is equivalent to the atomic number of the element. 3. _____ In order to convert the number of particles of a substance to the substance’s mass, it is necessary first to convert the number of particles to the number of moles. Answer the following: Show your work Correct significant figures and units on numbers 4. Calculate the number of atoms in 13.2 mol copper. 5. Calculate the number of molecules in 4.0 mol H2O. 6. How many moles of Ag contain 4.49 x 1023 atoms Ag? 7. Which element has a molar mass of 30.97 g/mol? a. Potassium c. Gallium b. Phosphorus d. Palladium 8. What is the correct molar mass for the compound Iron III Sulfate? 9. Determine the mass in grams of 0.0489 mol cobalt. 10. How many grams of potassium permanganate are in 2.20 moles? CIRCLE your answer. 11. What is the mass in grams of 1.02 x 1024 atoms manganese (Mn)? 12. Copper is one of a group of metals called the coinage metals. How many atoms of copper (Cu) are in a pure copper coin weighing 12.0 g? Use the following formula to answer questions 11-15. 64.32 g of Calcium Azide 13. What is the molar mass of the substance? 14. How many formula units are in the sample? 15. How many azide ions are in the sample? 16. How many nitrogen atoms are in the sample? 17. How many protons are in the sample? Name__________________________________ Period_______ PT #_____ Clicker #_____ The Mole Practice Quiz Answers True/False. If False Change the underlined portion so the answer is true 18. False Avogadro’s number refers to the number of particles in one gram of a substance. The molar mass 19. False An element’s molar mass is equivalent to the atomic number of the element. Atomic Mass 20. True In order to convert the number of particles of a substance to the substance’s mass, it is necessary first to convert the number of particles to the number of moles. Answer the following: Show your work Correct significant figures and units on numbers CIRCLE your answer. 21. Calculate the number of atoms in 13.2 mol copper. 7.95 x 1024 atoms Cu 22. Calculate the number of molecules in 4.0 mol H2O. 2.4 x 1024 molecules H2O 23. How many moles of Ag contain 4.49 x 1023 atoms Ag? 0.746 mol Ag 24. Which element has a molar mass of 30.97 g/mol? a. Potassium c. Gallium b. Phosphorus d. Palladium 25. Which is the correct molar mass for the compound Iron III Sulfate? 399.91 g/mol 26. Determine the mass in grams of 0.0489 mol cobalt. 2.88 g of Co 27. How many grams of potassium permanganate are in 2.20 moles? 348 g of KMnO4 28. What is the mass in grams of 1.02 x 1024 atoms manganese (Mn)? 93.1 g Mn 29. Copper is one of a group of metals called the coinage metals. How many atoms of copper (Cu) are in a pure copper coin weighing 12.0 g? 1.14 x 1023 atoms Cu Use the following formula to answer questions 11-15. 64.32 g of Calcium Azide 30. What is the molar mass of the substance? Ca(N3)2 molar mass is 124.14 g/mol 31. How many formula units are in the sample? 3.12 x 1023 formula units of Ca(N3)2 32. How many azide ions would be in the sample? 6.24 x 1023 ions of N333. How many nitrogen atoms would be in the sample? 1.87 x 1024 atoms of N 34. How many protons in the sample? 1.93 x 1025 protons