Answer:
16.00 g
Step-by-step explanation:
- To answer this question we need to understand the relationship between the atomic weight of an element and the molar mass.
- That is, the molar mass of an atom in grams is always equal to the atomic weight of the same atom.
in this case;
We can show that the molar mass of an atom is equivalent to the atomic weight of the atom.
Atomic weight of Oxygen atom = 16.00 a.m.u
But;
1 mole of Oxygen = 6.022× 10^23 atoms
Since;
1 a.m.u = 1.661 × 10^-24 g
Therefore;
Mass of oxygen atom = 16.00 a.m.u per atom × 1.661 × 10^-24 g per a.m.u
= 2.657 × 10^-24 g
But, 1 mole of Oxygen atom = 6.022 × 10^23 atoms
Therefore;
Mass of 1 mole of Oxygen atom = 2.657 × 10^-24 g × 6.022 × 10^23 atoms per mole
= 16.00 g
Therefore;
The molar mass of an oxygen atom is 16.00 g