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Mole Concept and Avogadro's Number

An iodized sa...

Question

An iodized salt contains $0.5 %$ of Nal. A person consumes 3 gm of salt every day. The number of iodide ions going into his body every day is:

A

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B

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C

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D

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Solution

The correct option is A

Moles of $I^{-}$ = moles of Nal = Nal
$\frac{W e i g h t N a l}{M o l N a l o f . N a l} = \frac{0.5 \times 3}{100} \times \frac{1}{150} = 10^{- 4} m o l e s$

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