Mole Concept Worksheet
Explore the mole concept in chemistry with this worksheet for grade 8 students, covering definitions, calculations, and applications.
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Mole Concept Worksheet
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Date:
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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 is a mole in chemistry, and why is it used?
2. State Avogadro's number and explain its significance.
3. The mass of one mole of a substance is called its mass.
4. One mole of any gas at Standard Temperature and Pressure (STP) occupies a volume of liters.
5. The chemical formula for water is . This means one molecule of water contains two hydrogen atoms and one atom.
6. Which of the following represents one mole of carbon atoms?
12 grams of carbon
6.022 x 10^23 carbon atoms
Both a and b
Neither a nor b
7. What is the approximate molar mass of H2O?
1 g/mol
16 g/mol
18 g/mol
32 g/mol
8. Observe the diagram of a water molecule below.
a) What is the chemical formula for water?
b) How many hydrogen atoms and oxygen atoms are present in one molecule of water?
9. Calculate the number of moles in 36 grams of water (H2O). (Atomic mass: H=1, O=16)
10. How many atoms are present in 2 moles of Helium (He)?
11. One mole of any substance contains the same number of particles.
True
False
12. The molar mass of a compound is the sum of the atomic masses of all atoms in its chemical formula.
True
False
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