Answer:
16.0 g; 3.1 mol
Explanation:
(a) Mass of O atoms
Mass = 6.022 × 10^23 atoms × (2.66 × 10^-23 g/1 atom) = 16.0 g
(b) Moles of O atoms
0.050 kg = 50 g
Moles = 50 g × (1 mol/16.0 g) = 3.1 mol
Answer : The mass of 1 mole of oxygen atoms is, 16.0 grams
The moles of oxygen atoms is, 3.1 moles
Explanation :
First we have to calculate the mass of 1 mole of oxygen atoms.
Given : Mass of 1 oxygen atom = [tex]2.66\times 10^{-23}g[/tex]
As, 1 atom of oxygen has mass = [tex]2.66\times 10^{-23}g[/tex]
So, [tex]6.022\times 10^{23}[/tex] atom of oxygen has mass = [tex](6.022\times 10^{23})\times (2.66\times 10^{-23})=16.0g[/tex]
Thus, the mass of 1 mole of oxygen atoms is, 16.0 g
Now we have to calculate the moles of oxygen atoms.
As per question, the mass of oxygen atoms = mass of a glass of water = 0.050 kg = 50 g
Formula used :
[tex]\text{Moles of oxygen atoms}=\frac{\text{Mass of oxygen atoms}}{\text{Molar mass of oxygen atoms}}[/tex]
Molar mass of oxygen atom = 16 g/mole
[tex]\text{Moles of oxygen atoms}=\frac{50g}{16g/mole}=3.1mole[/tex]
Therefore, the moles of oxygen atoms is, 3.1 moles
