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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
Which conversion factor would you use to calculate correctly the mass of 2 moles of the element titanium?
47.86 g Ti / 1 mol Ti
1 mol Ti / 47.84 g Ti
47.84 mol / 1 g Ti
47.87 g Ti / 1 mol Ti
- 12. 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
- 13. Multiple Choice
36.0 g of beryllium (Be) contains how many moles?
0.25 mol
4.0 mol
45 mol
320 mol
- 14. Multiple Choice
How many atoms would be contained in 454 grams of iron (Fe)?
6.02 x 1023 atoms
8.14 atoms
4.90 x 1024 atoms
55.85 x 1023 atoms
- 15. 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
- 16. 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
- 17. 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
- 18. 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
- 19. Multiple Choice
What is the mass of 6.25 mol of Cu(NO3)2?
126 g
785 g
625 g
1172 g
- 20. 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
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