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Quiz 3.2 – Moles and Elements

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Quiz 3.2 – Moles and Elements

Stephen August 14, 2024

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Question 1 of 10

1. Question

What is the number of atoms in 2 mole of an element?

\[6.022 \times {10^{23}}\]
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\[1.0 \times {10^{22}}\]
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\[2.03 \times {10^{23}}\]
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\[12.06 \times {10^{23}}\]
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Question 2 of 10

2. Question

The atomic number of an element represents:

The number of protons in the nucleus
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The number of neutrons in the nucleus
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The number of electrons in the nucleus
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The number of protons and neutrons in the nucleus
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Question 3 of 10

3. Question

Which of the following elements has the smallest atomic mass?

Oxygen
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Carbon
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Hydrogen
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Helium
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Question 4 of 10

4. Question

What is the molar mass of water (H₂O)?

18 g/mol
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34 g/mol
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20 g/mol
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24 g/mol
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Question 5 of 10

5. Question

How many moles of hydrogen atoms are there in 1 mole of methane (CH₄)?

1 mole
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2 moles
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4 moles
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8 moles
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Question 6 of 10

6. Question

Which of the following elements is not a metal?

Sodium
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Magnesium
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Chlorine
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Aluminum
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Question 7 of 10

7. Question

The molar mass of sodium chloride (NaCl) is approximately:

23 g/mol
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58.5 g/mol
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44 g/mol
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60 g/mol
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Question 8 of 10

8. Question

How many moles of oxygen atoms are there in the carbon dioxide (CO₂) of the equation of reaction?

5 moles
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7 moles
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10 moles
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20 moles
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Question 9 of 10

9. Question

Which of the following is a diatomic molecule?

Neon
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Argon
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Oxygen
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Helium
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Question 10 of 10

10. Question

If you have 1 mole of helium gas (He), what is its mass?

4 grams
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2 grams
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8 grams
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16 grams
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