Answer:
We don't have a limiting reactant.
The reactants are present in stoichiometrically equivalent amounts.
Option D is correct
Explanation:
Step 1: Data given
Molecules N2 = 25 molecules
Molecules F2 = 75 molecules
Number of Avogadro = 6.02 * 10^23 / moles
Step 2: Calculate moles N2
Moles N2 = molecules N2 / number of Avogadro
Moles N2 = 25 / 6.02 * 10^23
Moles N2 = 4.15 * 10^-23 moles
Step 3: Calculate moles F2
Moles F2 = 75 molecules / 6.02 * 10^23
Moles F2 = 1.25 *10^-22 moles
Step 4: Calculate limiting reactant
For 1 mol N2 we need 3 moles F2 to produce 2 moles NF3
For 4.15 * 10^-23 moles N2 we need 1.25 * 10^-22 moles F2
OR
For 25 molecules N2 we need 75 molecules F2
Both reactants will completely react.
This means we don't have a limiting reactant.
The reactants are present in stoichiometrically equivalent amounts.
Option D is correct