,

3.0 moles of is introduced in a 1 L closed reaction vessel at 380 K. The number of moles of at equilibrium is (Round off to Nearest Integer)

Question

,

3.0 moles of  is introduced in a 1 L closed reaction vessel at 380 K. The number of moles of  at equilibrium is  (Round off to Nearest Integer)

Canvas Classes · Accepted Answer

Step 1 — ICE table (V = 1 L, initial [PCl₅] = 3.0 M):

,

| | PCl₅ | PCl₃ | Cl₂ |
|--|--|--|--|
| Initial | 3.0 | 0 | 0 |
| Change |  |  |  |
| Equil. |  |  |  |

Step 2 — Solve for x:

Step 3 — Moles of PCl₅ at equilibrium:

M

Moles of  =  mol  mol (nearest integer in the required units)

Answer: 25

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