Use your answer to question 3 to calculate the al(iii) concentration in the original unknown solution by correcting for the dilution made when preparing the sample for analysis. see the "analysis of the unknown solution" step of the procedure section of the experiment for details of the sample preparation.

answer

i think the answer is a) as air pressure in an area increases, the density of the gas particles in that area decreases.

hope it

on passing the small ampere of electric current through the tube made of ar and hg of cfl generates uv rays which excites the fluorescent and thus emits the high radiation by consumption of just 5- 12 w in comparison to incandescent light which requires more power such as around 40 - 55 w to lighten.

moreover the life span of fluorescent or cfl is around 8000 h whereas the life span of incandescent is around 1200 h

hence, the building installed with incandescent lights bears more electricity bill.