Formula unit mass is used for the mass of the following compound

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NaCl

$H_{2} S$

$CC l_{4}$

${CH}_{4}$

answer is A.

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Detailed Solution

The term formula mass is used for ionic compounds only but not for covalent compounds. Among the given all NaCl is an ionic compound and the remaining three are covalent in nature. Hence, we can use the formula mass for NaCl.

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