Question

If avogadro number $N_A$, is changed from $6\cdot 022\times 10^{23}mo{l}^{-1}$ to $6\cdot 022\times 10^{20}mo{l}^{-1}$, this would change :

• A. the ratio of chemical species to each other in a balanced equation
• B. the ratio of elements to each other in a compound
• C. the definition of mass in units of grams
• D. the mass of one mole of carbon

Answer 1

Answer: (D)

$Q$ mass of $1mol(6.022\times 1023$ atoms) of carbon $=12g$
If Avogadro Number (NA) is changed than mass of $1mol(6\cdot 022\times 10^{20}$ atom) of carbon.
$=\frac{12\times 6.022\times 10^{20}}{6.022\times 10^{23}}=12\times 10^{-3}g$
Therefore the mass of $1mol$ of carbon is changed