Question

Calculate the mass (in grams) of one molecule of $C{H}_{3}COOH$.

(Molar mass of $C{H}_{3}COOH=60.06g/mol$)

• A. $9.97\times {10}^{-23}$
• B. $60.06$
• C. $9.97\times {10}^{23}$
• D. None of above

Answer 1

Answer: (A)

$9.97\times {10}^{-23}$

The molar mass of $C{H}_{3}COOH$ is given as $60.06g/mol$

We need to find the mass of 1 molecule of $C{H}_{3}COOH$

We can use this formula: $Numberofatoms=\frac{mass}{molarmass}\times Avogadronumber$

We can substitute the following values in the formula:

$Numberofatoms=1$

$Molarmass=60.06g/mol$

$Avogadrono.=6.022\times {10}^{23}$

$Numberofatoms=\frac{mass}{molarmass}\times Avogadronumber$

$\therefore 1=\frac{mass}{60.06}\times 6.022\times {10}^{23}$

$mass=\frac{60.06}{6.022\times {10}^{23}}$ $=9.973\times {10}^{-23}g$