If we consider that 1/6, in place of 1/12, mass of carbon atom

If we consider that 1/6, in place of 1/12, mass of carbon atom is taken to be the relative atomic mass unit, the mass of one mole of a substance will

  1. decrease twice
  2. remain unchanged
  3. increase two fold
  4. be a function of the molecular mass of the substance

Answer

1 atomic mass unit on the scale of 1/6 of C12 = 2 amu on the scale of 1/12 of C12.

Now, atomic mass of an element

=  Mass of one atom of the element/ 1 amu (Here on the scale of 1/6 of C-12)

= Mass of one atom of the element/ 2 amu (Here on the scale of 1/12 of C-12)

Numerically the mass of a substance will become half of the normal scale.

The correct option is A.