A sample of sodium containing Avogadro's number of atoms has a mass of

Question

This question seems really hard for me I really don't get it my teacher  explained it and I don't really know what it means..

Answer 1

Avogadro's number is the number of atoms required to make 1 gram of molecular hydrogen (not including the heavier isotopes of hydrogen).

 

Hydrogen, including all of its isotopes, has an atomic weight of 1.008, so a mole of them (a quantity equal to Avogadro's number) would weigh 1.008 grams

Sodium has a standard atomic weight of 22.99 amu  (atomic mass units). A mole of Sodium atoms would weigh 22.99 grams.