The characteristic properties of metals are associated with

a. loosely held valence electrons
b. completely filled energy levels
c. partially filled p orbital
d. strongly held valence electrons

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 :

d) a person who learns about the world by observing it.

explanation:

scientist are people who discover why and how things are done and made in the world.