Atomicity of white or yellow phosphorus is 4 and it is represented as P4 molecule.
Calculate the value of expression regarding this molecule.
Where X: Total number of vertex angles in P4 molecul

Question

Atomicity of white or yellow phosphorus is 4 and it is represented as P4 molecule.
Calculate the value of expression $\frac{X \cdot Y}{Z}$ regarding this molecule.
Where X: Total number of vertex angles in P4 molecule
Y: Total number of lone pairs in P4 molecule
Z: Total number of P—P bonds in P4 molecule

Prashant Kotian · Accepted Answer

Correct answer: 8 / X = 12, Y = 4, Z = 6. $\FRAC{X \CDOT Y}{Z} = \FRAC{12 \TIMES 4}{6} = 8$. Step 1: When zinc reacts with very dilute nitric acid (HNO3), the nitric acid is reduced to ammonium nitrate (NH4NO3). Step 2: The reaction is: 4Zn + 10HNO3 (very dilute) -> 4Zn(NO3)2 + NH4NO3 + 3H2O. Step 3: The oxidation state of nitrogen in the nitrate reactant (HNO3) is +5, and in the ammonium product (NH4^+) it is -3. Thus, the oxidation state changes from +5 to -3, matching option (b).

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