Answer: The mass of oxygen that combines with nitrogen will be 2.272g.
Step-by-step explanation:
To calculate the number of moles, we use the equation:
.....(1)
For Oxygen atom:
Given mass of oxygen atom = 1.14 g
Molar mass of oxygen atom = 16 g/mol
Putting values in above equation, we get:

For Nitrogen atom:
Given mass of nitrogen atom = 1 g
Molar mass of nitrogen atom = 14 g/mol
Putting values in above equation, we get:

For the given chemical reaction:

In 1 mole of nitrogen dioxide molecule, 1 mole of nitrogen atom combines with 2 moles of oxygen atom.
So, 0.071 moles of nitrogen will combine with =
of oxygen atom.
Now, to calculate the mass of oxygen atom, we use equation 1:

Hence, the mass of oxygen that combines with nitrogen will be 2.272g.