Chemistry · Some Basic Concepts of Chemistry (Mole Concept) + Stoichiometry

NEET (UG) 2024 — Question 54

The highest number of helium atoms is present in:

Answer: A

(1) 4 mol of $\mathrm{He}=4 \mathrm{~N}_{\mathrm{A}} \;\mathrm{He}$ atoms

(2) 4 u of $\mathrm{He}=\frac{4 u}{4 u}=1$ He atom

(3) 4 g of Helium $=\frac{4 \mathrm{~g}}{4 \mathrm{~g}}$ mole $=1$ mole $=\mathrm{N}_{\mathrm{A}}$ He atom

(4) 2.27 L of He at STP $=\frac{2.27}{22.4}$ mole $=0.1 \text { mole }$

$=0.1\mathrm{~N}_{\mathrm{A}} \;\mathrm{He} \;\text { atom }$

Answer key and solution verified before publishing.

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