Question

No.of molecules of SO2 gas liberated as consuming 3moles of Oxygen gas at STP in equation 2cu2+3o2-2cu2o+2So2​

Answer 1

number of molecules of SO₂ gas would be 1.2046 × 10²⁴

chemical reaction is ...

2Cu₂S + 3O₂ ⇒2Cu₂O + 2SO₂

given, no of moles of oxygen gas at STP = 3

we have to find number of molecules of SO₂ gas liberated in given reaction.

from above reaction, 3 moles of oxygen need to liberate 2 moles of sulphur dioxide gas.

so, number moles of of sulphur dioxide gas = 2

now number of molecules of SO₂ gas = 2 × Avogadro's number

= 2 × 6.023 × 10²³

= 12.046 × 10²³

= 1.2046 × 10²⁴

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