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Mr. Kovall's Neighborhood

Return to Chem I Home Page(01-09-07)

Chapter 4 -

Mole Concept WorksheetDirections: Complete each problem by writing the answer on the blank line and/or by circling the correct termfound within the parentheses.

1. 2 H = ________________ H (atoms, molecules)

2. H2 = ________________ H (atoms, molecules) = _____ H2 molecules = _____ moles H2 molecules

3. 2 H2 = _______________ H (atoms, molecules) = _____H2 molecules = _____ moles H2 molecules

4. 5 H2O = ______________ H2O (atoms, molecules = _____ moles of H2O molecules

5. O2 = ________________ mole(s) of oxygen molecules = _____ moles of oxygen atoms

6. 3 H2 = _______________ moles of hydrogen atoms

7. 3 H2 = _______________ moles of hydrogen molecules

8. 5 H2O = _______________ moles of water molecules

9. 1 mole of oxygen atoms = the __________ mass in grams = _____________ grams

10. 1 mole of oxygen molecules = ______________ grams

11. 4 moles H2SO4 = ___________________ grams

12. 3 moles AlPO4 = ___________________ grams
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13. 1 mole Cl2 molecules = __________________grams

14. 1 mole of iron (Fe) atoms has _________________(number) atoms

15. 1 mole of iron oxide (FeO) molecules has __________________(number) molecules

16. 2 moles of calcium phosphate, Ca3(PO4)2, contains _____ moles calcium ions + _____ moles phosphate

ions.

17. 5 moles of cupric sulfate, CuSO4, contain _________________(number) sulfate ions.

18. 6.022 x 1023 atoms of any element, or 6.02 x 1023 molecules of any compound, is known as a(n)

__________.

Directions: If the statement is true, circle T. If the statement is false, circle F , underline the portion of the

statement that is in error and write the correction above the error.

19. One mole of zinc contains only one atom of zinc. (T , F)

20. One mole of oxygen atoms and one mole of sulfur atoms weigh exactly the same number of grams.(T, F)

21. 6 Na stands for six moles of sodium atoms. (T , F)

22. 5 Br2 is the way to write five moles of bromine atoms. (T , F)

23. One mole of NaCl is greater than one molecule of NaCl. (T , F)


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24. One mole of copper contains more atoms than one mole of sodium. (T , F)

25. One mole of oxygen molecules (O2) weighs 16.00 grams. (T , F)

Directions: Complete each statement by writing the correct term or phrase on the blank line

26. The gram atomic weight of an element is the weight of ______________________ of that element.

27. The gram molecular weight of calcium chloride, CaCl2, is equal to _____________________________.

28. Avogadros number, _________________________, is the number of atoms in ___ _________ of anelement.

29. The correct formula for 2 moles of fluorine gas molecules is __________.

30. 3 moles of carbon atoms are equal to _____________________ atoms of carbon.

31. 2 Na2SO4 weights _________________________ grams.

Mole-Related Problems

All math work must be shown. A complete list of answers to all the problems, including those below,

is available. Just click on: solutions.

1. What is the mass, in grams, of each of the following:a. 1.00 mol Li

b. 1.00 mol Al

c. 1 molar mass Cad. 1.00 molar mass Fe

e. 6.022 x 1023 atoms C

f. 6.022 x 1023 atoms Ag
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2. Determine the mass, in grams, of each of the following:

a. 3.00 mol Al

b. 4.25 mol Lic. 1.38 mol N

d. 8.075 mol Au

e. 6.50 mol Cuf. 2.57 x 108 mol S

g. 1.75 x 10-6 mol Hg

3. How many MOLES of atoms are represented by each of the following:a. 40.08 g Ca

b. 11.5 g Na

c. 5.87 g Nid. 150 g S

e. 2.65 g Fe

f. 0.00750 g Ag

g. 3.25 x 105 g Pbh. 4.50 x 10-12 g O

4. How many MOLES of atoms are equivalent to each of the following:a. 6.022 x 1023 atoms Neb. 3.011 x 1023 atoms Mg

c. 2.25 x 1025 atoms Zn

d. 50.0 atoms Ba

5. How many ATOMS are contained in each of the following:

a. 1.50 mol Na

b. 6.755 mol Pb

c. 0.250 mol Si


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6. What is the MASS, in grams, for each of the following:

a. 3.011 x 1023 atoms F

b. 1.50 x 1023 atoms Mgc. 4.50 x 1012 atoms Cl

d. 8.42 x 1018

atoms Bre. 25.0 atoms W

f. 1.00 atoms Au

7. Determine the number of ATOMS contained in each of the following:

a. 5.40 g B

b. 8.02 g Sc. 1.50 g K

d. 0.02550 g Pt

e. 1.00 x 10-10 g Au

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