I need help with my chemistry homework

(no3)⁻n has oxidation number x,o has oxidation number -2.(x*1 -2*3) charge of the nitrate ion, and we know that charge of the nitrate ion =-1.so,(x*1 -2*3) =-1x-6=-1x=+5answer a. +5.

Declaration of independence basically declares war with britain while bill of rights is document with the rights of the people written down.

Aquantity of that isotope to decay to 1/2 of  its original value