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  4. 0.5 mol of potassium ferrocyanide contains carbon equal to: (Formula of potassium ferrocyanide is K 4[ Fe ( CN )6].

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Q. $0.5\, mol$ of potassium ferrocyanide contains carbon equal to: (Formula of potassium ferrocyanide is $K _{4}\left[ Fe ( CN )_{6}\right]$.

Some Basic Concepts of Chemistry

Solution:

$0.5$ mol of $K _{4}\left[ Fe ( CN )_{6}\right]$

has $C =\frac{1}{2} \times 6 \,mol$

$=3 \,mol$

or $3 \times 12=36 \,g $