Bthe atomic number of nitrogen is 7. what is the mass number of a nitrogen atom with 6 neutrons? express your answer as an integer.

Mass number is equal to the sum of number of neutrons (neutral subatomic particle) and number of protons (positively charge particle).

Mass number  =

Now, atomic number is same as the number of protons i.e. atomic of nitrogen is 7 . Thus, number of protons is also equal to 7.

Therefore,

Mass number  =

=

Hence, mass number of nitrogen is equal to .

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 :