Question

When 1 L of $C{O}_2$ is heated with graphite, the volume of the gases collected is 1.5 L. Calculate the number of moles of $CO$ produced at STP.

• A. $\frac{1}{11.2}$
• B. $\frac{28}{22.4}$
• C. $\frac{1}{22.4}$
• D. $\frac{14}{22.4}$

Answer 1

Answer: (C)

$\frac{1}{22.4}$

$C{O}_2\left(g\right)+C\left(s\right)⟶2CO\left(g\right)$

$1L$ $0$ $0$ of $C{O}_2$ consumed

$1-x$ $2x$ x is amount

$⟹(1-x)+2x=$ Total volume $=1.5x$

$⟹x=0.5$ $L$

So, amount of $CO$ consumed $=1$ $L$

$⟹1$ $mole$ of $CO\to 22.4$ $L$ $CO\left(g\right)$

$y\to 1L$ $CO$

$⟹y=\frac{1}{22.4}$ $moles$ of $CO$

Hence, the correct option is C.