(a) Describe the steps involved in a sampling operation. (b) Distinguish between primary and secondary sampling.

(c) Outline the methods used to reduce a sample to a manageable size.

(d) Why should you prefer dry-ashing to wet-ashing of a food sample such as

cabbage?

(e) How would you prepare a protein free filtrate (PFF)?​

where is the following

explanation:

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 :