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- 1. Multiple Choice
How many molecules are in 63 grams of water?
18.02 moleclues
3.8 x 1025 moleclues
2.1 x 1024 moleclues
3.5 molecules
- 2. Multiple Choice
Determine the number of atoms in 26.00g of chromium.
3.0 x 1023 atoms
4.15 x 10-24 atoms
2.71 x 10-22 atoms
0.5 atoms
- 3. Multiple Choice
How many grams are in 7.5 X 1023 molecules of H2SO4
(Masses: H=1, S=32, O=16)
98.09 g H2SO4
122g H2SO4
45g H2SO4
100g H2SO4
- 4. Multiple Choice
Determine the number of atoms in 2.50 moles of Zinc.
4.15 x 10-24 atoms
1.51 x 1024 atoms
163 atoms
2.71 x 10-22 atoms
- 5. Multiple Choice
If you have 4.57 x 1013 atoms of copper, how many moles do you have?
7.59 x 10-11 moles
2.75 x 1037 moles
7.59 x 1011 moles
2.75 x 1033 moles
- 6. Multiple ChoiceHow many molecules are there in 31.8 moles of water?5.28 x 10-23 molecules1.91 x 1025 molecules5.28x 10-251.91 x 1022
- 7. Multiple Choice
Which statement is the BEST definition of a mole?
One mole of a substance contains 6.02 x 1023 atoms of that substance.
One mole of a substance contains 6.02 x 1023 particles, but different masses.
A mole is 12 g of any element.
A mole of any substance contains the same number of particles as 12 g of naturally occurring carbon.
- 8. Multiple Choice
Calculate the molar mass of NH4NO2
50 g/mol
60 g/mol
64 g/mol
78 g/mol
- 9. Multiple Choice
Calculate the molar mass of Ba(C2H3O2)2
255.3 g/mol
237.3 g/mol
228.3 g/mol
196.3 g/mol
- 10. Multiple Choice
Which statement correctly identifies how mass, mole, and atoms are related?
Atomic Number = 1 mole = 6.02 x 1023 atoms
Molar Mass = 1 mole = 6.02 x 1023 atoms
Molar Mass = 0.5 mole = 3.01 x 1023 atoms
Atomic Number = 0.5 mole = 3.01 x 1023 atoms
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