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what are comis salts .
50ml of 0.1M NH 4 OH ,25ml NH 4 Cl weere used to make a buffer . what is the PH is if Pk b is 4.8? Solution) The given buffer is a base buffer [NH4OH] =[(50*0.1)/75] [NH4Cl] =[(
whatdo you mean by gravitational force constant ?
An element has the electronic configuration 1s 2 , 2s 2, 2p 6 , 3s 2 , 3p 2 . Its valency electrons are: (1) 6 (2) 2 (3) 3 (4)4 Ans: 4
Chloride of metal is MCl 2 . The formula of its phosphate will be: (1) M 2 PO 4 (2) M 3 (Po 4 ) 2 (3) M 2 (
write a short note on cyclic voltametry
what is 1 u equal to ?
Which of the following atoms and ions are isoelectronic i.e. have the same number of electrons with the neon atom: (1) F - (2) Oxygen atom (
What kind of relation is there between them and the force constants of vibration that you have calculated? The enthalpies of vaporization of carbon and silicon are 717 kJmol -1
show how you would sythesise the following compounds, starting with benzene or toluene and any necessary acyclic reagents. Assume para is the major product.
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