Norco comes in 5, 7.5, and 10mgs with 325mg of tylenol. Vicodin comes in 5, 7.5, and 10mg and has 100mg of tylenol per 1mg of hyrocodone.
If you snort it, you nasal membranes will be covered with so much apap (tylenol) that they will barely be able to absorb any of the hydrocodone.
Just eat it if you are going to take it.