Mass and Moles Worksheet
Explore the concepts of mass, atomic mass, molecular mass, and moles in chemistry with this Grade 8 science worksheet.
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Mass and Moles Worksheet
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Read each question carefully and answer to the best of your ability. Show all your work for calculation problems.
1. What unit is typically used to measure the mass of an atom?
grams
kilograms
atomic mass units (amu)
liters
2. What does a 'mole' represent in chemistry?
A small animal that lives underground
A unit of volume
A unit representing 6.022 x 10^23 particles
A type of chemical bond
3. The mass of an element is the weighted average mass of an atom of the element.
4. Avogadro's number is approximately .
5. To find the molecular mass of a compound, you add the masses of all the atoms in the compound.
6. Explain the difference between atomic mass and molecular mass.
7. If you have 1 mole of carbon (C), how many carbon atoms do you have? And what is its mass in grams? (Atomic mass of C = 12.01 amu)
8. The mass of a proton is approximately equal to the mass of an electron.
True
False
9. A mole of any substance contains the same number of particles.
True
False
10. Calculate the molecular mass of water (H2O). (Atomic mass of H = 1.01 amu, O = 16.00 amu)
11. How many grams are in 2 moles of sodium chloride (NaCl)? (Atomic mass of Na = 22.99 amu, Cl = 35.45 amu)
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