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Calculate the molar concentration of the solution essential to obtain the value of 10 molecules per µm2. (For this calculation we suppose that the transfer of the dye molecules from solution to the sample surface by evaporation of the solvent is homogeneous on the whole wetted area.)
The sample is illuminated with the 543.5 nm-line of a green He-Ne laser. The excitation power is adjusted so that the illuminated area (100 nm in diameter) is hit by 3 · 1010 photons per second.
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
Describe the following electrochemical methods in terms of their working principles instrumentation and applications i. Potentiometry ii. polarography iii. Conductometry
What do you mean by limiting diffusion current in polarography
Since flourine is very electronegative as a result hydrogen makes a very positive character.as a result the H-bonding is very strong because of large difference in electronegativit
Electrophiles - Organic Chemistry Electron deficient species or electron acceptor is an electrophile, It can be categorized into two types : (A) Charged electrophiles (B)
When Ethanoic acid is mixed with methanol what is the end product?
On the basis of electrical conductivity the solids can be broadly classified into three types: (a) Metals (b) Insulators (c) Semiconductors Electrical conductiv
Electrolytes are compound containing: (1) Electrovalent bond (2) Covalent bond (3) Coordinate bond (4) Hydrogen bond Ans: Electrovalent bond
The concentration of hydrogen ions in solution affects the enzyme activity. Every enzyme has maximal efficiency under an optimum pH. As pH is one of the factors for the denatura
The magnetic quantum number for valency electrons of sodium is: (1) 3 (2) 2 (3) 1 (4) 0 Ans: 0
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