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Stoichiometric Calculations

Calculate the...

Question

Calculate the mass of iron which will be converted into its oxide by the action of 18 g of steam.

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Solution

The reaction occurs as:
$3 F e + 4 H_{2} O \to F e_{3} O_{4} + 4 H_{3}$
$\frac{M o l e o f F e}{M o l e o f H_{2} O} = \frac{3}{4}$
Mole of $F e$ = $\frac{18}{18} \times \frac{3}{4}$
Weight of $F e$ = $\frac{3}{4} \times 56 = 42 g$

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