CBSE Class 11-science Answered
Expert Answer
Percent Composition:
It is the percent by mass of each element present in a compound.
Take example of water.
One mole of water is 18.0152 gms
In water, there are two moles of hydrogen atoms = 2 x 1.008 = 2.016gms
It also has one oxygen atom = 1 x 16 = 16gms
To obtain the percentage of hydrogen
% of hydrogen = 2.016/18.015 x 100 = 11.19%
% of oxygen = 16/18 .015x 100 =88.81%
Molecular formula:
Molecular formula shows the exact number of different types of atoms present in a molecule of a compound.
Molecular formula = n x Empirical formula
Percent Composition:
It is the percent by mass of each element present in a compound.
Take example of water.
One mole of water is 18.0152 gms
In water, there are two moles of hydrogen atoms = 2 x 1.008 = 2.016gms
It also has one oxygen atom = 1 x 16 = 16gms
To obtain the percentage of hydrogen
% of hydrogen = 2.016/18.015 x 100 = 11.19%
% of oxygen = 16/18 .015x 100 =88.81%
Molecular formula:
Molecular formula shows the exact number of different types of atoms present in a molecule of a compound.
Molecular formula = n x Empirical formula
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