Question:
Which one of the following will have the largest number of atoms?
Which one of the following will have the largest number of atoms?
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For equal masses, the substance with the smallest molar mass contains the largest number of particles.
Updated On: Apr 29, 2026
- \(1\) g \(Au(s)\)
- \(1\) g \(Na(s)\)
- \(1\) g \(Li(s)\)
- \(1\) g \(C_2(g)\)
- \(1\) g \(O_2(g)\)
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The Correct Option is C
Solution and Explanation
Number of atoms is proportional to:
\[
\frac{\text{mass}}{\text{molar mass}}
\]
Smaller molar mass means more atoms for the same mass.
Among the options, lithium has the smallest molar mass:
\[
M_{Li}\approx 7
\]
Hence, \(1\) g of lithium has the largest number of atoms.
\[
\boxed{(C)\ 1\text{ g }Li(s)}
\]
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