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The total negative charge in 1 mol of helium (atomic number 2, atomic mass 4) is:

  • a)
    9.6 x 10C

  • b)
    1.9 x 105 C

  • c)
    3.8 x 105 C

  • d)
    4.8 x 104 C

Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
The total negative charge in 1 mol of helium (atomic number 2, atomic ...

  • He atom has 2 electrons.

  • So, 1 mole of He has 2*N(N is Avogadro's no.) electrons.

  • Then total -ve charge in 1 mole He gas is =  2 * N * charge of 1 electron

    = 2 * (6.022 * 1023) * (1.6 * 10-19) = 1.92 * 105

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Community Answer
The total negative charge in 1 mol of helium (atomic number 2, atomic ...
Correct answer is B...... no of electrons in one mole of He=2×6.023×10*23..........charge on each electron is =1.6×10*-19........hence total negative charge on 1 mol He = 2×6.023×10*23×1.6×10*-19 = 19.27×10*4 =1.9×10*5C
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