What percentage of all winter weather related injuries are from freezing precipitation?

20%. By forming an iceglaze over the surfaces, freezing precipitation accounts for 20% of all winter weather related injuries in the United States. When the freezing precipitation leads to accumulation of 0.25 inch ice, it is known as Ice storm.

The answer is probably c. xylem

(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.