Question #0de15

1 Answer
Apr 15, 2016

Ar=58.99

Explanation:

The number of moles of a substance is given by:
mass(grams)Relative atomic mass,Ar

And one mole comprises (Avogadro's constant), NA=6.022×1023 atoms / molecules.

So number of atoms is given by:
mass(grams)NARelative atomic mass,Ar

In this case

(16.26×103gAr)(6.022×1023)=1.66×1020

Rearranging gives:

Ar=(16.26×103g)6.022×10231.66×1020
so
Ar=58.99