Question

What is the mass of $120c{m}^3$ of carbon dioxide at S.T.P?

• A. 0.15 g
• B. 0.17 g
• C. 0.23 g
• D. 0.25 g

Answer 1

The correct option is C

0.23 g

$C{O}_2$ (1 mole)

$22400c{m}^3$ of $C{O}_2$ at S.T.P weighs $\to$ $12$ + $(16\times 2)$

= $44$ g

$\therefore$ $120c{m}^3$ of $C{O}_2$ at STP weighs $=\frac{44}{22,400}\times 120$

= $0.23$ gms