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Question

Calculate the number of moles in 128g of SO2 :


A

1mole

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B

2 mole

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C

3mole

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D

4mole

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Solution

The correct option is B

2 mole


The explanation for correct option:

  • The molar mass of sulfur is 32gand the molar mass of oxygen is 16g.
  • Therefore the molar mass of SO2=32+(2×16)=64g
  • We know the mole number is weightofSO2MolarmassofSO2=12864=2mole

The explanation for the incorrect options:

The given mole number is not correctly representing the mole number of 128gofSO2.


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