Is a flashlights purpose to produce late or to produce heat

A flashlight (more often called a torch outside North America) is a portable hand-held electric light. The source of the light is usually an incandescentlight bulb or light-emitting diode (LED). ... In addition to the general-purposehand-held flashlight, many forms have been adapted for special uses.

D. is the answer hope that you

(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.