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Question 1:
(i) What are the main physical properties of hydrogen sulphide?
(ii) Which occupational group of workers is often exposed to hydrogen sulphide?
(iii) Outline two acute and four chronic health effects of human exposure to hydrogen sulphide.
(iv) Suggest four engineering and four administrative controls to hydrogen sulphide at workplaces.
Explain briefly the importance of material safety data sheet.
Define Colligative Properties of A Dilute Solution? The colligative properties of a solution are usually considered to be: 1. Freezing-point depression: the decrease in the
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CALCIUM CARBONATE TEST METHOD
A 75g piece of Ag is heated to 80 degree celcius and drooped into 50g of water at 23.2 degree celcius.The final tempereture of Ag-H2O mixture is 27.6degree celcius.what is the spec
your HPLC system has efficiency 1500 theor. Plates, but baseline is very noisy. You have a choice either increase response time or decrease attenuation. what will you choose and wh
what is electrovalent bond
Ask question #Minimu1. A laboratory animal exercised on a treadmill that was connected to a weight with a mass of 250. g through a pulley. The work done by the animal raised the we
Solid xenon forms crystals with a face centered unit cell that has an edge of 620 pm. 1. calculate the atomic radius of xenon. 2. calculate the packing efficiency if xenon. So
(a) Which aqueous solution has higher concentration 1 molar or 1 molar solution of the same solute? Give reason. (b) 0.5g KCI was dissolved in 100g water and the solution origi
uses of the polymer bakelite
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