would the ph shift observed with the buffer hace been greater less or the same if 0.4 M buffer had been used instead of 0.2

It will remain the same.

Explanation:

A buffer solution is a kind of solution that has resistance for changes in the pH of a solution. It is a solution of weak acid and conjugate base or it may be otherwise.

H^+ + A^- <> HA.

Buffer solution aids in stabilizing pH and an example of a buffer solution is the human blood.

The higher the concentration, the lower the ka and vice versa. Thus, when 0.4M is being used instead of 0.2M the pH will be the same because when dealing with buffer solution, it is all about the value of (salt) / (acid) rather than on the molarity of one specie alone.

c. because step up transformer steps up the input voltage i.e increases the input voltage  

the number of turns are greater on the secondary side of step up transformer  

transformer does not handle dc current

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 :