Question

If avogadro number $N_A$, is changed from $6 \cdot 022 \times 10^{23} \,mol ^{-1}$ to $6 \cdot 022 \times 10^{20} \,mol ^{-1}$, 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 $1 mol (6.022 \times 1023$ atoms) of carbon $=12 g$
If Avogadro Number (NA) is changed than mass of $1 mol \left(6 \cdot 022 \times 10^{20}\right.$ 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 $1 mol$ of carbon is changed