Calculate the equivalent mass of sodium.

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Equivalent mass
The equivalent mass of an element is defined as the number of parts by mass, of that element which can displace or combine with 1.008 parts by mass of Hydrogen or 8 parts by mass of oxygen or 35.5 parts by mass of Chlorine.
$\cdot E q u i v a l e n t m a s s = \frac{A t o m i c m a s s}{v a l e n c y} \cdot A t o m i c m a s s o f s o d i u m = 23 \cdot V a l e n c y o f S o d i u m = 1 \cdot T h e r f o r e E q u i v a l e n t m a s s = \frac{23}{1} = 23$

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