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Question

Which one of the following statements is false for 0.5mol C2H6? (C=12, H=1 and take Avogadro number = 6×1023)



Your Answer
A
It is 15 g
Your Answer
B
It includes molecules
Your Answer
C
It includes 1mol C atom
Correct Answer
D
It includes 4 atoms

Solution

The correct option is C It includes 4 atoms

molar mass of C2H6=2.(12)+6.(1)=30gmol, 1mol C2H6 is 30gmol  0.5mol C2H6 is = 15gmol A is true
1mol C2H6 includes 6×1023 C2H6 molecule, 0.5 mol C2H6 includes
C2H6 molecules = 3×1023 C2H6 molecules B is true
           1 mol C2H6 includes 2mol C atoms 0.5mol C2H6 include? Mol C atoms, C is true
1mol C2H6 includes 8NA atoms 0.5mol C2H6 includes = 4NA atoms, D is false.

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