Respuesta :

Hey there!

Atomic Masses :

H = 1.00794  a.m.u
N = 
14.0067  a.m.u
O = 
15.9994  a.m.u

Therefore:

HNO3 = 
1.00794 + 14.0067 + ( 15.9994 * 3 ) =>  63.0128 g/mol
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