Respuesta :

The molecular mass of [tex]HNO_2[/tex] is: 1·1 + 1·14.01 + 2·16 = 47.01 g/mol.


Now we can convert the mass into mol of [tex]HNO_2[/tex]:


[tex]74.3\ g\ HNO_2\cdot \frac{1\ mol}{47\ g} = \bf 1,58\ mol\ HNO_2[/tex]