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- 1. Multiple Choice
Which of the following statements regarding the mole is incorrect?
A mole is a counting unit equal to 6.02 x 1023 particles.
The number of particles in a mole is known as Avogadro’s number.
A mole of particles of an element is numerically equal to the atomic mass of the element.
none of the above
- 2. Multiple ChoiceHow many molecules are in 2.00 moles of H2O?124x1024 molecules of H2O1.20x1023 molecules of H2O1.20x1024 molecules H2O124
- 3. Fill in the Blank
State the type of mass you will obtain from the substance H2O.
- 4. Fill in the Blank
State the type of mass you will obtain from the substance Si.
- 5. Fill in the Blank
Compute for the mass of H2O.
- 6. Multiple Choice
What name is given to the number of atoms in a mole of an element?
Planck's constant
Avogadro's constant
Newtonian constant
- 7. Multiple Choice
How many moles are 98.3 grams of aluminum hydroxide, Al(OH)3? (Atomic mass of Al = 27, H= 1, O = 16)
1.26 moles
0.8 moles
7,673.4 moles
150 moles
- 8. Multiple Choice
How many atoms are contained in 25 g of NaBr? (Atomic mass of Na = 23, Br = 35)
102.96 molecules
0.24 molecules
1.45x1023 molecules
2.34 x 1020molecules
- 9. 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
- 10. Multiple Choice
How many moles are 98.3 grams of aluminum hydroxide, Al(OH)3? (Ar Al=27, H=1, O=16)
1.26 moles
0.8 moles
7,673.4 moles
150 moles
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