Question

In which of the following formula mass is preferred
over molecular mass?
(1)KCl
(2)C2H6
(3)N2
(4)H2O​

Answer 1

Answer: KCl is an ionic compound thats why formula mass is preferred for it.

Answer 2

Among the given compounds, the formula mass is preferred over molecular mass in KCl.

Explanation:

• The formula which gives information on the name and number of atoms present in the compound is called a molecular formula.
• The total atomic mass of each element present in the compound is called the formula mass.
• Among the given compounds, apart from KCl, all the other three are indicated with the number of atoms present in each compound.
• Due to this reason, as the number of atoms is not mentioned in KCl, its formula mass is preferred over molecular mass.

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