When 5.1 g of solid is introduced into a 2 litre evacuated flask at 27 °C, 20% of the solid decomposes into gaseous ammonia and hydrogen sulphide. The for the reaction at 27 °C is . The value of x i

Question

When 5.1 g of solid  is introduced into a 2 litre evacuated flask at 27 °C, 20% of the solid decomposes into gaseous ammonia and hydrogen sulphide. The  for the reaction at 27 °C is . The value of x is

Canvas Classes · Accepted Answer

Step 1 — Moles of :

Molar mass of  = 14 + 4 + 1 + 32 + 1 = 51 g/mol

mol

Step 2 — Moles decomposed (20%):

mol

Reaction:

Moles of  = moles of  = 0.02 mol each

Step 3 — Partial pressures (V = 2 L, T = 300 K):

atm

Step 4 — :

So .

Answer: 4

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