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Volume of Gases and Number of Moles

27.6 g of K...

Question

$27.6$ g of $K_{2} C O_{3}$ was treated by a series of reagents so as to convert all of its carbon to $K_{2} {Z n}_{3} {[F e {(C N)}_{6}]}_{2}$ . Calculate the mass of the product formed. (round it to nearest integer value)

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Solution

Following conservation of atoms of carbon,
$27.6 g$ $K_{2} C O_{3} = \frac{27.6 \times 12}{138} = 2.4 g$ carbon.
So, mass of product forms $K_{2} {Z n}_{3} {[F e {(C N)}_{6}]}_{2}$ $= 698 \times \frac{2.4}{144} = 11.63 g$ .
So, integer value is 12.

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