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  4. The sodium salt of methyl orange has 7 % sodium by mass. What is the minimum molecular weight of compound :-

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Q. The sodium salt of methyl orange has $7\%$ sodium by mass. What is the minimum molecular weight of compound :-

NTA AbhyasNTA Abhyas 2020

Solution:

$7=\frac{1 \times 23}{M_{w}}\times 100$
$M_{w}=329$