Question

If Avogadro number N_A, is changed from 6.022 x 10²³ mol^-1 to 6.022 x 10²⁰ 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

Correct option: (D) the mass of one mole of carbon

When Avogadro number is 6.022 x 10²³ mol^-1,the mass of 1 mol of carbon = 12 g

∴ Mass of 1 mol of carbon when Avogadro number is 6.022 x 10²⁰ mol^-1

= \(\cfrac{12\, \times\, 6.022\, \times\, 10^{10}}{6.022\, \times \, 10^{10}}\) = 12 x 10^-3 g

Thus, the mass of 1 mol of carbon is changed.