Introduction to Moles
A Grade 10 chemistry worksheet covering the concept of moles, Avogadro's number, and molar mass calculations.
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Introduction to Moles
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Read each question carefully and answer to the best of your ability. Show all your work for calculation problems.
1. A mole is defined as the amount of substance that contains particles.
2. The number 6.022 x 10^23 is known as number.
3. The molar mass of an element is numerically equal to its mass in grams.
4. To convert between moles and mass, you use the .
5. Which of the following represents the molar mass of water (H₂O)? (Atomic masses: H=1.01 g/mol, O=16.00 g/mol)
17.01 g/mol
18.02 g/mol
2.02 g/mol
34.02 g/mol
6. How many atoms are in 1 mole of helium?
1 atom
6.022 x 10^23 atoms
4.00 g
Infinite atoms
7. Calculate the molar mass of CO₂. (Atomic masses: C=12.01 g/mol, O=16.00 g/mol)
8. How many moles are present in 49.0 g of sulfuric acid (H₂SO₄)? (Atomic masses: H=1.01 g/mol, S=32.07 g/mol, O=16.00 g/mol)
9. The image below shows a water molecule. If you have 36.04 grams of water, how many water molecules do you have? Show your calculations.
10. One mole of any substance always has a mass of exactly 1 gram.
True
False
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