Mole ratio of Fe in FeO , Fe 2 O 3 and Fe 3 O 4 samples of equal weights is

Question

Mole ratio of Fe in FeO , Fe 2 O 3 and Fe 3 O 4 samples of equal weights is (A) 1: 2: 3 (B) 0.9: 1: 0.93 (C) 1: 0.9: 0.93 (D) 3: 2: 1

Tardigrade Admin · Accepted Answer

As mole, n=(w/ text molecularwt. ) Moles of FeO: Fe 2 O 3: Fe 3 O 4 (w/72): (w/160): (w/232) moles of F e=(w/72): (2 × w/160): (3 w/232) i.e., 1: 0.9: 0.93 .

Q. Mole ratio of $F e$ in $F e O, F e_{2} O_{3}$ and $F e_{3} O_{4}$ samples of equal weights is

$1 : 2 : 3$

$0.9 : 1 : 0.93$

$1 : 0.9 : 0.93$

$3 : 2 : 1$

As mole, $n = \frac{w}{molecularwt.}$
Moles of $F e O : F e_{2} O_{3} : F e_{3} O_{4}$
$\frac{w}{72} : \frac{w}{160} : \frac{w}{232}$
moles of $F e = \frac{w}{72} : \frac{2 \times w}{160} : \frac{3 w}{232}$
i.e., $1 : 0.9 : 0.93.$

Q. Mole ratio of Fe in FeO,Fe2​O3​ and Fe3​O4​ samples of equal weights is

1:2:3

0.9:1:0.93

1:0.9:0.93

3:2:1