Question

The volume occupied by one molecule of ethanol is:

( density of ethanol = $0.8g/c{m}^3$)

• A. $9.55\times {10}^{-23}c{m}^3$
• B. $6.30\times {10}^{-23}c{m}^3$
• C. $13.60\times {10}^{-23}c{m}^3$
• D. $2.94\times {10}^{-23}c{m}^3$

Answer 1

The correct option is A $9.55\times {10}^{-23}c{m}^3$

$1$ mole of ethanol $=46g$

$6.023\times {10}^{23}$ molecules of ethanol $=46g$

$1$ molecules of ethanol $=\frac{46}{6.023\times {10}^{23}}$

$1$ molecule $=7.637\times {10}^{-23}g$

Volume of one molecules of ethanol $=\frac{mass}{density}$

$=\frac{7.637\times {10}^{-23}}{0.8}$

$=9.55\times {10}^{-23}c{m}^3$