Answer / manas

Density is a physical characteristic of material or substance.
The mass density or density of a material is defined as its
mass per unit volume.
So Density=M/V
Units of Density:-
The SI unit for density is:

kilograms per cubic metre (kg/m3)
kilograms per litre (kg/L)
grams per millilitre (g/mL)
metric tons per cubic metre (t/m3)

Answer / balu

Density:
Ratio of mass per unit volume. Used as a factor for
interconversion of mass and volume.

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2 Answers   BNPM,

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Question 91 - In the application of Theory of Spectrometry in spectrophotometer, let n = N x C x V, V = A x t, e = a x N where n = number of molecules, N = Avogadro's number, V = volume of cuvette, A = area of cuvette, t = thickness of cuvette, C = concentration of fluid in the cuvette, e = extinction coefficient, a = effective area of molecule. (a) By using calculus in dI = -I x a x N x C x dt, prove that ln (I / Io) = -a x N x C x t, where dI is the small difference in I and dt is the small difference in t. I = intensity of light. Io = initial intensity of light. (b) Show by calculations that ln (Io / I) = e x C x t based on the answer in the previous question (a). (c) Find the equation of log (Io / I) as a function of e, C and t based on the answer in the previous question (b).

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how did you spend today

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How can one determine the particle size distribution for a given bulk solid?

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