Question

Which of the following contains maximum number of atoms ?

• A. 2.0 mol of $S_8$
• B. 6.0 mol of S
• C. 5.5 mol of $S{O}_2$
• D. 44.8 L of $C{O}_2$ at S.T.P

Answer 1

Answer: (C)

(A) Atoms in $2.0$ mol of $S_8=2\times 8\times 6.02\times 10^{23}$
$=9.632\times 10^{24}$
(B) Atoms in $6.0$ mol of $S$
$=6\times 6.02\times 10^{23}=3.612\times 10^{24}$
(C) Atoms in $5.5$ mol of
$S{O}_2=3\times 5.5\times 6.12\times 10^{23}=9.93\times 10^{24}$
(D) Atoms in $4.48L$ of $C{O}_2$ at $S.T.P.$
$=\frac{3\times 4.48\times 6.02\times 10^{23}}{22.4}$
$=4.816\times 10^{23}$