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Q.

If  1 12 moles of oxygen combine with Al to form Al2O3 the weight of Al used in the reaction is (Al = 27)

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a

54 g

b

27 g

c

49.5 g

d

31 g

answer is B.

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Detailed Solution

2Al+ 32 O2  →  Al2O3According to equation  32  mole  of O2  combines  with  2  moles  Al.2  mole Al=54  g

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