Chemistry
Grade-9
Easy

Question

1 atomic mass unit is equal to

  1. 1.6605 x 10 kg
  2. 1.6605 x 1024 kg
  3. 6.026 x 1024 kg
  4. 1.6605 x 1023 kg

hintHint:

An atomic unit of mass is defined as accurately 1/12 the mass of a carbon-12 atom.

The correct answer is: 1.6605 x 1024 kg


     An atomic unit of mass is defined as accurately 1/12 the mass of a carbon-12 atom. 
    1 a.m.u. = (1/12) cross times (12/6.022*1023) g
                   = 1.66 cross times 10-27 kg

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