Chem133 Lesson 2 Quiz Questions and Answers with Complete Solutions 100% Correct | New Update 2025

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Chem133 Lesson 2 Quiz Questions and Answers with
Complete Solutions 100% Correct | New Update 2025



Question 1 points

Which of the following samples contains the greatest number of atoms?
Question options:
20 million O2 molecules

2.0 mole of Ar

100 g of Pb

5 g of He

0.1 mole of Fe

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Question 2 points

You have a sample of zinc (Zn) and a sample of aluminum (Al). You have an equal
number of atoms in each sample. Which of the following statements concerning
the masses of the samples is true?
Question options:
The mass of the aluminum sample is more than
twice as great as the mass of the zinc sample.
The mass of the aluminum sample is more than
the mass of the zinc sample, but it is not twice as
great.
The mass of the zinc sample is more than twice as
great as the mass of the aluminum sample.

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The mass of the zinc sample is more than the
mass of the aluminum sample, but it is not twice
as great.
The masses of each sample are equal.

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Question 3 points

What is the mass of 4 atom(s) of copper in grams?
Question options:
254.2 g

6.022 x 1023 g

2.37 x 1021 g

9.57 x 10–24
g
4.22 x 10–22 g

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Question 4 points

How many silver atoms are contained in 3.75 moles of silver?
Question options:
2.44 × 1026 silver
atoms
6.50 × 1025 silver
atoms
1.61 × 1023 silver
atoms
2.26 × 1024 silver atoms

6.23 × 1024 silver
atoms
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Question 5 points