Question

The number of $g$ molecule of oxygen in $6.0\times {10}^{24}$ molecules of $CO$ gas is:

• A. $1g$ molecule
• B. $0.5g$ molecule
• C. $5g$ molecule
• D. $10g$ molecule

Answer 1

The correct option is C $5g$ molecule

Number of g molecule of $O=$ Number of mole of $O$ gas

Number of moles of $CO$ $=\frac{6.022\times {10}^{24}}{6.022\times {10}^{23}}=10$

No. of moles of oxygen atom $=10$

No. of g molecule of $O$ is $\frac{10}{2}=5$ g