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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.
Ask question #MinimName two compound that are covalent when taken pure but produce ions when dissolved in water. um00 words accepted#
Give reasons for the following: a. Molten aluminium bromide is poor conductor of electricity. b. Nitric oxide becomes brown when released in air. c. PCl
how to write chemistryindailylife assignment
graph for the titration of barium chloride versus sodium sulphate
Which of the following sets of orbitals may degenerate : (1) 2s, 2p x , 2p y (2) 3s, 3p x , 3d xy (3) 1s, 2s, 3s
crystal field splitting in octahedral complexes.
Q. Describe Structure of Solids? Ans. Solids are different from gases and liquids because they have a fixed shape. This definite shape occurs as the individual particles w
Q. A sample of water on analysis was found to contain the following analytical data: Mg (HCO 3 ) 3 = 16.8mg/L, MgCl 2 = 19mg/L, Mg (NO 3 ) 2 = 29.6 ppm, CaCO 3 = 20 p
obtain the mole of substance in the following. 7.05g Br2
Which one of the following is not isoelectronic with O 2- : (1) N- 3 (2) F - (3) Tl + (4) Na + Ans: Tl +
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