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- 1. Multiple Choice
The number 6.022 x 1023 is called...
A dozen
Bohr's number
Buckley's number
Avogadro's number
- 2. Multiple Choice
Which has more molecules?
1 mole H2O
1 mole CH4
1 mole Cl2
They're are all the same.
- 3. Multiple Choice
One mole of sulfur (S) is equal to home many atoms?
32 atoms
16 atoms
1.20 x 1023 atoms
6.022 x 1023 atoms
- 4. Multiple Choice
To convert from moles to particles, you should multiply by ....
- 5. Multiple Choice
To convert from particles to moles, you should multiply by ....
- 6. Multiple Choice
5.11 x 1023 atoms of lithium (Li) is equal to how many moles?
1.18 moles
0.351 moles
1.34 moles
0.849 moles
- 7. Multiple Choice
0.75 mole of copper (Cu) is equal to how many atoms?
8.03 x 1023 atoms
6.02 x 1023 atoms
4.51 x 1023 atoms
3.11 x 1023 atoms
- 8. Multiple Choice
What is the mass of one mole of potassium (K)?
19 grams
39.10 grams
30.97 grams
38 grams
- 9. Multiple Choice
To convert from moles to grams, you should multiply by ....
- 10. Multiple Choice
To convert from grams to moles, you should multiply by ....
- 11. Multiple Choice
0.50 moles of carbon (C) is equal to how many grams?
6.0 grams
12.0 grams
8.0 grams
14.0 grams
- 12. Multiple Choice
36.0 g of beryllium (Be) contains how many moles?
0.25 mol
4.0 mol
45 mol
320 mol
- 13. Multiple Choice
Find the mass in grams of 2.25 x 1024 atoms of calcium (Ca).
40.0 grams
255.1 grams
150 grams
9.02 x 1024 grams
- 14. Multiple Choice
What is the molar mass of AuCl3?
96.00 g/mol
130.00 g/mol
232.51 g/mol
303.32 g/mol
- 15. Multiple Choice
What is the molar mass of (NH4)3PO4
113.02 g/mol
124.13 g/mol
149.12 g/mol
137.00 g/mol
- 16. Multiple Choice
What is the mass of 2.50 mol of oxygen gas (O2)?
40.0 g
80.0 g
16.0 g
32.0 g
- 17. Multiple Choice
What is the mass of 6.25 mol of Cu(NO3)2?
126 g
785 g
625 g
1172 g
- 18. Multiple Choice
If I have 6.02 x 1023 molecules of CO2, what is the mass?
44.0 g
2.65 x1023 g
1.37 x1022 g
96.0 g
- 19. Multiple ChoiceHow many moles are in 15 grams of lithium?0.5 moles104.1 moles2.2 moles50 moles
- 20. Multiple ChoiceHow many moles are 2.85 x 1018 atoms of iron?4.73 x 10-6 moles1.72 x 1042 moles1.72 x 10-42 moles4.73 x 106 moles
- 21. Multiple ChoiceHow many moles of copper are 4.57 x 1013 atoms of copper?7.59 x 10-11 moles2.75 x 1037 moles7.59 x 1011 moles2.75 x 1033 moles
- 22. Multiple ChoiceWhat is the mass in grams of 6.25 mol of copper (II) nitrate?126 g785 g625 g1172 g
- 23. Multiple Choice
Which conversion factor should be used to solve the following, "How many moles of argon atoms are present in 11.2 L of argon gas at STP?" What is the correct answer for the number of moles of argon at STP?
1 mol = 22.4 L , 0.5 mols
1 mol = 39.95 g, 6.28 g
1 mol = 6.02x1023 atoms, 1.86 X 10-23
More than 1
- 24. Multiple ChoiceHow many molecules are in 32.4 grams of phosphorous pentoxide?1.76 x 1023 molecules0.29 moles1.76 x 1022 molecules0.29 molecules
- 25. Multiple Choice
What is the volume of 160 g of oxygen gas at STP?
112 L
22.4 L
78.8 L
114.24 L
224 L
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