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Calculate the saponification value of a fat which consumed 9ml of KOH during titration?
An oil X has a saponification Value of 100 and an Oil Y has a saponification
Value of 70. Which oil will have a high molecular weight and long fatty acid chain?
Which of the following is a primary hazard caused by an earthquake? *
tsunami
landslides
cracks on the ground/ faults
liquefaction
10 things event situation that we can see light
3. A fertiliser contains ammonium iron (II) sulphate, FeSO4.(NH4)2SO4.6H2O as a source of iron. A 6.50 g sample of this fertiliser is made up to 250 mL with dilute sulphuric acid. 25 mL of this solution is reacted with 23.5 mL of 0.01 mol L-1 potassium dichromate (K2Cr2O7) solution as shown by the balanced equation below.
Cr2O7²- + 6Fe²+ +14H+ ---> 2Cr³+ + 6Fe³+ + 7H2O
(i) Calculate the moles of Cr2O72+ ions that has reacted.
(ii) Determine the moles of Fe2+ ions that has reacted
(iii) Calculate the mass of Fe in the 25 mL aliquot (M(Fe) = 56 g mol-1))
(iv) Determine the total mass of Fe present in the 6.50 g sample of fertiliser.
(v) Calculate the percentage of Fe in the fertiliser.
1.What is the mass in grams of three atoms of sodium? 23Na. Molar mass = A in g/mol
think at least 15 ways to reduce water pollution explain briefly each way.
0.1216 gram added to 20 liter of Hcl the acces acid was neutrlized by addition of 50 ml of 0.20 Molar of NAOH find the atomic mass
A sample of ammonia (NH3), a colorless gas with a pungent odor, occupies a volume of 3.00 L at a pressure of 655 mm Hg and a temperature of 25°C. What volume, in liters, will this NH3 sample occupy at the same temperature if the pressure is increased to 725 mm Hg? *
Your laboratory just received several sample containers of peas to analyze for moisture content. There is a visible condensate on the inside of the container. What is your procedure to obtain a result?
