Honors Chemistry
Moles WS # 2 (14 problems are required)
Name ________________________ Period______
Use dimensional analysis to solve the following problems. – Use correct sig. figs, label and circle answer
Complete the
problems if you 1. Love pumpkins and/or 2. need the extra practice.
“Particles”
Atoms – if an element
x
Atoms
FU or molecule
Molecules -if a covalent compound
Formula units -if an ionic compound
Atoms
x FU or molecule
Atoms
Find the number of moles from grams
1. How many moles are in 33 grams of copper?
2. How many moles are in 15 grams of lithium?
3. How many moles are in 31.3 grams of sodium phosphide?
4. How many moles are there in 25.2 grams of magnesium nitrate?
5. If you have 12.0 grams of Lead II sulfite, how many moles of do you have?
6. If you have 1.1 grams of calcium phosphate, how many moles do you have of calcium phosphate?
7. How many moles are there in 987 grams of ammonium sulfate?
8. How many moles are there in 56 grams of silver cyanide?
Find the number of grams
9. How many grams are in 2.4 moles of sulfur?
10. How many grams are in 88.1 moles of magnesium?
11. How many grams are in 12.3 moles of copper I arsenide?
12. How many grams are in 34 moles of sodium phosphide?
13. How much does 4.2 moles of magnesium nitrate weigh?
14. How many grams are in 25 moles of lead (II) sulfite?
Find moles from “particles”:
15. Find the number of moles of Cu in 3.75 x 1025 atoms of Cu.
16. How many moles of N2O5 are in 8.56 x 1025 molecules of N2O5?
17. How many moles of NaCl are in 8.56 x 1025 formula units of NaCl?
Find atoms from moles:
18. Find the number of Mg atoms in 4.23 moles of Mg?
19. How many atoms are in 2.06 mol of H2O2?
20. How many atoms are in 6.51 moles of BaCl2?
21. How many O atoms are in 5.15 mol of Be(OH)2?
Challenging:
22. How many grams of H2SO4 are in 3.01 x 1023 molecules of H2SO4?
23. How many atoms are in 35 g of Be(OH)2?
Mixed Review:
24. What is the molar mass of H2SO4?
25. How many moles are in 35 g of Be(OH)2?
26. How many atoms are in 7.32 mol of C6H12O6?
27. How many atoms are in 3.41 mol of Al2(SO4)3?
28. How many atoms of S are in 3.41 mol of Al2(SO4)3?
29. How many O atoms are in 6.78 mol of NaNO3?
30. How many moles of N2O5 are in 8.56 x 1025 molecules of N2O5?