a crystal is known as tiny grains in alloys of aluminum and manganese. To analyz

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Explanation / Answer

The balanced reaction of Al is ,

AL + 3 HCl = ALCl3 + 1.5 H2

Similarly, the balanced reaction of Mg is

,Mn(s) + 2 HCl(aq) = MnCl2(aq) + H2(g)

So, the ratios of H2 gas of Al and Mn will be 1.5:1 = 3:2

Now, Total moles of H2 = 4.623 * 10^-5

Moles of H2 due to Al = (3/5) x 4.623 * 10^-5 = 2.7738 * 10^-5 = moles of Al

Moles of H2 due to Mn =  (2/5) x 4.623 * 10^-5 = 1.8492 * 10^-5 = moles of Mn

Mole fraction of Mn = 1.8492 * 10^-5 / ( 4.623 * 10^-5) = 0.4

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