To convert between moles and molecules, you need
a. use avogadro's number as a conversion factor
b. use molar mass as a conversion factor
c. use molar volume at stp as a conversion factor
d. multiply by a whole number ratio equal to the molecular formula

indium, and thallium have three electrons i 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 :