The ring weighs 77.2 g. Using the picture to the right, did your bae get the ring from a jewelry store or quarter machine? (gold has a density of 19.3g/cm3) Must show calculations.

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 :

answer; the numbers of valence electrons in the acetic acid molecule (ch3co2h) is 24;