Which of the following molecules has a nonpolar covalent bond?
a. h–br
b. h–cl
c. h–f
d. h–h

D. H-H

With the other 3, one atom is more electronegative, drawing the electrons closer to it and making one side slightly positive, making it polar. With H - H, though, both atoms are the same, so the molecules are shared evenly and it is nonpolar.

answer: the value of enthalpy change will be -152.80 kj.

solution:

pressure = 1atm , temperature = = 298 k

given that pressure and temperature are same in both gases , the number of moles of both gases can be determined by the ideal gas equation.

according to reaction 3 moles no are reacting with 1 mol of ,then 0.49 mol of no will react with moles of ozone that is 0.16 moles of ozone. since, no is limiting reagent and is an excessive reagent.

enthalpy change for the reaction between the given volumes of the gases is :