Question

How many grams are contained in 1 gram-atom of $Mg$?

• A. 12 g
• B. 20 g
• C. 24 g
• D. 48 g

Answer 1

The correct option is C 24 g

1 gram-atom of $Mg=6.022\times {10}^{23}$ atoms of $Mg$

We know, atomic mass of $Mg=24u=24\times 1.66054\times {10}^{-24}g$
So, the mass of one g-atom of $Mg=24\times 1.66054\times {10}^{-24}\times 6.022\times {10}^{23}$
= 24 g