Question

. Find out the molecular mass of Acetic Acid

Answer 1

Answer:

60.05 gm /mol

Explanation:

Molar mass ={2×12.011(C)+4×1.00794(H)+2×15.999(O)}.g.mol

−1

=60.05.g.mol

The molar mass of acetic acid is 60.05⋅g⋅mol

Answer 2

$\star$ Concept

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Molecular Mass is the sum of individual atoms in the molecule .Start the question by writing chemical formula of Acetic acid and the add the molar mass of individual atoms.

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Complete step by step answer :

$\sf\implies$ Chemical formula of Acetic acid $\rightarrow$ (C $H_{3}$ COOH)

$\rightarrow$ Atomic mass of C = 12

$\rightarrow$ Atomic mass of O = 16

$\rightarrow$ Atomic mass of H = 1

Molecular mass :

• Since , there are 2 carbon atoms

$\rightarrow$ 2 × atomic mass of C

• Since, there are 2 atoms of oxygen

$\rightarrow$ 2 × atomic mass of O

• Since, there are 4 atoms of hydrogen

$\rightarrow$ 4 × atomic mass of one hydrogen atom

$\sf\implies$ 2× 12 + 2 × 16 + 4 × 1

$\sf\implies$ 24 + 32 + 4

$\sf\implies$ 60

Since , Molecular mass is donated by u

$\therefore$ Molecular mass of Acetic acid is 60 u.