Q24 / 155 · WBJEE 2020 · Chemistry

What will be the mass of one atom of ${ }^{12} \mathrm{C}$ ?

  • A
    1 a.m.u.
  • Correct answer
    B
    $1.9923 \times 10^{-23} \mathrm{~g}$
  • C
    $1.6603 \times 10^{-22} \mathrm{~g}$
  • D
    6 a.m.u.

Solution

Hint: Mass of 1 atom of ${ }^{12} \mathrm{C}=12$ a.m.u. $=12 \times 1.66 \times 10^{-24} \mathrm{~g}=1.9923 \times 10^{-23} \mathrm{~g}$

Hence, the correct answer is option: 'B'.

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