What mass of H2 is necessary to react completely with 80L of N2?
N2 + H2 --
NH3 (Unbalanced)

Well technically there are two correct answers b and d. but for you its probably b in general.good day sir/ma'am : ) (i know not gender)

The water cycle increase the water content in the earth atmosphere

(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.

Idont really know sorry