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//clc()
Na = 23;//gm/mol
MNa = 100;//kg
N = MNa * 1000 / Na ;//g-atoms
NNa2SO4 = N / 2;
disp("kmol",NNa2SO4,"(a) moles of sodium sulphate = ")
MNa2SO4 = 142.06;
m = NNa2SO4 * MNa2SO4/1000;
disp("kg",m,"(b)kilograms of sodium sulphate = ")
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