Avogadro's Number Worksheet
Explore Avogadro's Number, the mole concept, and its applications in chemistry for Grade 9 science students.
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Avogadro's Number: The Mole Concept
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Read each question carefully and answer to the best of your ability. Show all your work for calculation problems.
1. Avogadro's number is approximately equal to particles per mole.
2. A mole is a unit used to measure the of a substance.
3. The molar mass of an element is numerically equal to its mass in grams.
4. Which of the following represents Avogadro's number?
6.022 x 10^22
6.022 x 10^23
6.022 x 10^24
1.000 x 10^23
5. What is the approximate molar mass of water (H2O)? (Atomic masses: H=1 g/mol, O=16 g/mol)
1 g/mol
16 g/mol
18 g/mol
32 g/mol
6. Explain the significance of Avogadro's number in chemistry.
7. How many atoms are present in 2 moles of Helium (He)?
8. Avogadro's number is only applicable to atoms, not molecules.
True
False
9. One mole of any substance contains the same number of particles.
True
False
10. This image shows a water molecule (H2O). How many atoms are in one molecule of water?
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