# What is the molar mass of acetic acid (CH_3COOH)?

Oct 6, 2016

$\text{The molar mass of acetic acid is } 60.05 \cdot g \cdot m o {l}^{-} 1$

#### Explanation:

And how did we get this quantity? All I did was take the molar mass of each element in the formula of acetic acid, weighted according to its frequency, i.e.

$\text{Molar mass}$ $=$

$\left\{2 \times 12.011 \left(C\right) + 4 \times 1.00794 \left(H\right) + 2 \times 15.999 \left(O\right)\right\} \cdot g \cdot m o {l}^{-} 1$

$=$ $60.05 \cdot g \cdot m o {l}^{-} 1$.

And can you tell me how many acetic acid molecules there are in such a mass?