Percentage composition
• It allows us to determine the
percentage or amount of each element
on a specific compound.
, Formula
% of A = (# of atom in Element) ( atomic mass) x 10 %
Formula mass of substance
,Find the Percent Composition
of
H and O in H2O molecule.
, Given : H2O = 18.02 amu
Reqd ? % Composition of H and O.
Formula :
Soln. % H = (2H atoms) ( 1.01 amu) x 100 %
18.02 amu
= 0.1121 x 100
= 11.21 H atoms
• It allows us to determine the
percentage or amount of each element
on a specific compound.
, Formula
% of A = (# of atom in Element) ( atomic mass) x 10 %
Formula mass of substance
,Find the Percent Composition
of
H and O in H2O molecule.
, Given : H2O = 18.02 amu
Reqd ? % Composition of H and O.
Formula :
Soln. % H = (2H atoms) ( 1.01 amu) x 100 %
18.02 amu
= 0.1121 x 100
= 11.21 H atoms
