The atomic mass of an atom can be found by
a) adding the number of protons and number of neutrons in the atom.
b) adding the number of protons and number of electrons in the atom.
c)adding the number of neutrons and number of electrons in the
atom.
d)subtracting the number of neutrons from the number of protons in
the atom.

h let me think

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 :