Question

If Avogadro’s number $N_A$, is changed from $6.022\times {10}^{23}{\text{mol}}^{-1}$ to $6.022\times {10}^{20}{\text{mol}}^{-1}$, 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

The correct option is D the mass of one mole of carbon

$\because$ mass of 1 mol $(6.022\times {10}^{23}\text{atoms})$ of carbon
= $12\text{g}$
If Avogadro Number $\left(N_A\right)$ is changed
than mass of 1 mol $(6.022\times {10}^{20}\text{atom})$ of carbon
$=\frac{12\times 6.022\times {10}^{20}}{6.022\times {10}^{23}}=12\times {10}^{-3}\text{g}$

Therefore the mass of 1 mol of carbon is changed