Question

The average mass of one atom of gold is $3.2707\times {10}^{-22}$ g. The molar mass of gold is:

• A. $6.022\times {10}^{23}$
• B. $197$
  
• C. $100$
  
• D. cannot caluculate
  

Answer 1

The correct option is B $197$


molar mass of gold = mass of one atom of gold $\times$ $N_A$ = $3.2707\times {10}^{-22}\times 6.022\times {10}^{23}=196.99=197$g