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Nitric acid formula is HNO3, its atomic mass is 63.02g
% composition of H= (1.01/63.02)* (6.022*10^23)
%composition of  N= (14.01/63.02)*(6.022*10^23)
%composition of O= (48.00/63.02)*(6.022*10^23)

here ^ stands for power

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