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Vapour density of metal chloride is 66. Its oxide contains 53% metal . What is the atomic mass of the metal ?
2×V.D= molecular mass..:2×66=132 is moecular mass of the metal.its oxide has 53%metal. i.e 100 gm oxide will have 53 gm metal.that is 47 gm of Oxygen i.e. approximatly 3 moles of oxygen. So one molecule of metal has 3 atoms of oxygen. This implies that it is of formA2O3. Most probably Al2O3.Now let's cross chek.atomic mass of Al is 26.5 26.5×2= 53.(Yeah we got it!)Its chloride is AlCl3.26.5+3×35.5= 26.5+ 106.5=133.So hete is your answer. atomic wt. of the metal is 26.5.
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