Concept explainers
How many atoms are there in 5.8 mol helium?
a. 23.2 atoms
b.
c.
d.
Interpretation: The number of atoms in
Concept Introduction: One mole of the substance contains
Answer to Problem 1SAQ
Correct Answer: Thenumber of atoms in
Explanation of Solution
Reason for correct option:
In order to carry out the conversions between moles of atoms and number of atoms, use the conversion factor as follows:
To determine the number of helium atoms present in
As the given value is in two significant figures, the final answer should also be in two significant figures.Roundoff the answer to two significant figures; hence, the answer is
Hence, option (d) is correct.
Reasons for incorrect options:
Option (a)is incorrect because according to the above relation, the value
Option (b) is incorrect because the value
Option (c)is incorrect as per the above relation. The value
Hence, options (a), (b), and (c) are incorrect.
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