Which of the following would a chemist be most likely to study ?
a leaf floating on water
a leaf changing color in autumn
a leaf being blown by the wind
a leaf being eaten by insects

a leaf changing color in autumn

Explanation:

The chemist is a professional who has the knowledge of chemical science. The chemist studies about the chemical changes occurring in nature by experimental analysis.

The change in color of reaction can be indicative of a chemical reaction occurring in the leaf. Thus a chemist should study the change in color of the leaf.

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 :