Moles of hydrogen in 9.15×10−2 mol c4h10

From the given formula, one mole of C4H10 contains 10 moles of hydrogen.

To know the number of moles of hydrogen in 9.15x10^-2, we will just do a cross multiplication as follows:
number of moles of hydrogen = (9.15 x 10^-2 x 10) / 1 = 0.915 moles

Bis the

(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.