What is the concentration, in m/v%, of a solution prepared by dissolving 50. g nacl in a total volume of 2.5 l of solution?

- Concentration of the solution in m/v% is 2.

Solution:- m/v% means mass by volume percentage.

(m/v)% = (mass of solute/volume of solution in mL)100

given, mass of solute = 50. g

volume of solution = 2.5 L = 2500 mL

Let's plug in the values in the formula.

(m/v)% = (50/2500)100 = 2%

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answer: semi-infinite solid initially at a uniform temperature of 400 ◦c is cooled at its surface by convection. the cooling fluid at a constant temperature of 200 ◦c has a convective coefficient (ha) of 250 w/m2.k. the physical properties of the solid: k = 20 w/m.k and α = 4 * 10-5  m2/s. using δx = 0.04 m and δt = 10 s. write the finite difference equations describing the transient heat transfer of the first five δx and the temperature profile after 30 s.