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- 1. Multiple Choice
How many molecules of AlCl3 are in 9.44 moles of AlCl3?
5.68 molecules
5.68x1024 molecules
0.705 molecules
1.25x1023 molecules
- 2. Multiple Choice
How many grams are in 11.9 moles of chromium?
0.229g
4.37g
52.0g
619g
- 3. Multiple Choice
How many moles are in 15.0 g of lithium?
104 mol
2.16 mol
6.94 mol
15.0 mol
- 4. Multiple ChoiceFind the molar mass of:
Pb(NO3)2241 g/mol207 g/mol301 g/mol331 g/mol - 5. Multiple Choice
How many moles are in 9.8 grams of calcium?
0.24 moles
4.1 moles
1.0 mole
390 moles
- 6. Multiple Choice
How many molecules are there in 5.9 moles of NaCl?
3.5x1024 molecules
9.80x10-24 molecules
1.02x1023 molecules
6.02x1023 molecules
- 7. Multiple Choice
How many moles are present in 32.3 grams of carbon dioxide (CO2)?
44.0 moles
1420 moles
32.3 moles
0.734 moles
- 8. Multiple Choice
How many molecules are in 150.0g if Na2SO4?
9.03x1025 molecules
1.056 molecules
6.357x1023 molecules
5.701x1023 molecules
- 9. Multiple Choice
You have two sealed flasks. The first flask contains 22.99 grams of solid sodium (Na). The second flask contains 200.59 grams of liquid mercury (Hg). Which flask has more moles of the indicated substance?
The first flask
The second flask
Neither.
- 10. Multiple Choice
You have 2 moles of graphite (KC8) in your pencil. How many grams of graphite are in your pencil?
135.19 g
270.37 g
67.59 g
134 g
- 11. Multiple Choice
What is the molar mass of Hydrogen, H2?
1.01 moles
2.02 grams
2.02 g/mol
1.01 g/mol
- 12. Multiple Choice
How many moles is 4 grams of silicon?
4 moles
0.14 moles
28.085 moles
1.4 moles
- 13. Multiple Choice
How many moles is 19.5 grams of Sodium?
19.5 moles
0.85 moles
22.99 moles
8.5 moles
- 14. Fill in the Blank
- 15. Multiple Choice
Mass in grams of one mole of any pure substance.
percent composition
empirical formula
molecular weight
molar mass
- 16. Multiple Choice
Which of the following dimensional analysis setups will correctly convert 4.00x1023atoms of cobalt to moles of cobalt? How many moles of colbalt are there?
setup B : 0.664 mol Co
setup A: 2.41x1047mol Co
setup A : 0.664 mol Co
setup B: 2.41x1047mol Co
- 17. Multiple Choice
Avogadro's Constant, L, always refers to....
The number of particles in one mole
The number of moles in one gram
The number of atoms in one mole
The atomic mass of each element
The number of molecules in one mole
- 18. Multiple ChoiceHow many moles are in 3.01 x 1022 atoms of magnesium?0.0500 moles1.81 x 1046 moles5.00 x 1021 moles5.00 moles
- 19. Multiple ChoiceHow many molecules are in 2.00 moles of H2O?124x1024 molecules of H2O1.20x1023 molecules of H2O1.20x1024 molecules H2O124
- 20. Multiple Choice
What is the molar mass of Oxygen?
8 grams
8 moles
15.999 grams/mol
15.999 moles
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