Question

Which of the gases contains the same number of molecules of $O_{2}asin16gof{O}_2$?

• A. $16gS{O}_3$
• B. $32gS{O}_2$
• C. $16gS{O}_2$
• D. All of the above

Answer 1

The correct option is B $32gS{O}_2$

16 g of $O_2$ has $\frac{6.023\times {10}^{23}}{2}$ molecules= $3.01\times {10}^{23}$
16 g of $S{O}_3$ has less than 0.5 moles of $O_2$, thus less than $3.01\times {10}^{23}$
32 g of $S{O}_2$ has 0.5 moles of $O_2$, thus $3.01\times {10}^{23}$ molecules
16 g of $S{O}_2$ has 0.25 moles of $O_2$, thus $1.5\times {10}^{23}$ molecules
thus option (C) is correct