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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.
Which type of compounds show high melting and boiling points: (1) Electrovalent compounds (2) Covalent compounds (3) Coordinate compounds (4) All the three types of co
give an clear explanation about kohlrauschs law
Evaluation of food quality A common practice employed to evaluate the shelf life of a given food product is to determine changes in selected quality characteristics over a per
Qualitative analysis A salt contains two parts defined as radicals. The positively charged part of a salt (cation) that has been derived from a base is known as basic radical a
Q. Show Multiplying Quantities Written in Scientific Notation? Multiplying Quantities Written in Scientific Notation Solve the following problem. (2 * 10 14 cm) * (9 *
Which of the following is least soluble: (1) BeF 2 (2) NaBr (3) CaF 2 (4
Potassium permanganate is prepared from pyrolusite (MnO 2 ) . Pyrolusite is fused with KOH in the presence of atmospheric oxygen or an oxidising agent like potassium nitrate or po
why are some liquids purified by distillation under reduced pressure
Anionic Detergent - Types of Detergent Long chain alcohols are utilized in the manufacture of few of the synthetic anionic detergents. The comprehensive chain alcohols are trea
A 0.5 m 3 rigid tank is filled with saturated liquid water at 200 o C. A valve at the bottom of the tank is opened, and liquid is withdrawn from the tank. Heat is transferred to t
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