Question

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 substance will

• A. be a fuction of the molecular mass of the substance
• B. remain unchanged
• C. increases two fold
• D. decreases twice

Answer 1

Answer: (D)

Relative atomic mass of the element
$=\frac{\text{Mass of one atom of the element }}{\text{1/12 th part of the mass of one atom of carbon -12}}$
$=\frac{\text{Mass of one atom of the element}}{\text{Mass of one atom of C−12}}\times 12$
Now if we are $1/6$ in place of $1/12$ the formulae becomes
$=\frac{\text{Mass of one atom of the element}}{\text{Mass of one atom of C−12}}\times 6$