Hydrogen chloride has 2.74 % Hydrogen and 97.26 % Chlorine by mass.
The chemical compound is a combination of two or more either similar or dissimilar chemical elements.
For example, H₂O is a chemical compound made up of two oxygen atoms and a single hydrogen atom.
As given in the problem we have to calculate the percentage composition of the hydrogen chloride,
the molar mass of HCl =molar mass of hydrogen + molar mass of chlorine
=1.0 g + 35.45 g
= 36.45 gram
Percentage of hydrogen in hydrogen chloride = (1 /36.45) x 100 = 2.74 %
the percent of Chlorine in hydrogen chloride = 100%-2.76% = 97.26 %
Therefore, hydrogen chloride has 2.74 % Hydrogen and 97.26 % Chlorine by mass.
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