What is the mass per cent of oxygen in ethanol?

Question

What is the mass per cent of oxygen in ethanol? (A) 52.14 % (B) 13.13 % (C) 16 % (D) 34.73 %

Tardigrade Admin · Accepted Answer

Molecular formula of ethanol = C2H5OH Molar mass of ethanol = 2 × 12.01 + 6 × 1.008 + 16 = 46.068 g Mass per cent of oxygen =(16/46.068) × 100 = 34.73 %

Q. What is the mass per cent of oxygen in ethanol?

$52.14%$

$13.13%$

$16%$

$34.73%$

Molecular formula of ethanol $= C_{2} H_{5} O H$
Molar mass of ethanol $= 2 \times 12.01 + 6 \times 1.008 + 16$
$= 46.068 g$
Mass per cent of oxygen $= \frac{16}{46.068} \times 100$
$= 34.73%$

Q. What is the mass per cent of oxygen in ethanol?

52.14%

13.13%

16%

34.73%

Molecular formula of ethanol =C2​H5​OH Molar mass of ethanol =2×12.01+6×1.008+16 =46.068g Mass per cent of oxygen =46.06816​×100 =34.73%

$52.14%$

$13.13%$

$16%$

$34.73%$

Molecular formula of ethanol $= C_{2} H_{5} O H$
Molar mass of ethanol $= 2 \times 12.01 + 6 \times 1.008 + 16$
$= 46.068 g$
Mass per cent of oxygen $= \frac{16}{46.068} \times 100$
$= 34.73%$