The flow rate of liquid effluent from a chemical plant is measured to be 20 m3/hr and has a density of 1000 kg/m3. After analysing the effluent it is found to contain 0.6 mole% Na2SO4 and 6 mole% NaCl – the rest is water. Calculate the mass of Na2SO4 and the mass of NaCl discharged from the plant.

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Units and Dimensions

Dimensions are the basic concepts of the measurement of quantities. Units are the means of expressing the dimensions. For instance, an area has a dimension of L2 and a unit of m2.