Question

Balance the chemical equation given below and calculate the number of molecules of so2 gas when liberated on consuming of 3 mol of ovygen gas at s.t.p.:

Answer 1

Answer:

3mole of SO2

mole = Molecules /Na

Molecules = 3Na

N = 18 × 10^23

Na = 6.02 × 10^23

Answer 2

Complete Question:

Balance chemical equation given below and calculate the number of molecules of SO₂ gas when liberated on consuming of 3 mole of oxygen gas at STP :

Cu₂S + O₂ → Cu₂O + SO₂

Solution:

- The balanced chemical equation is:

2 Cu₂S + 3 O₂ → 2 Cu₂O + 2 SO₂

- If 3 moles of oxygen is consumed, then 2 moles of SO₂ is liberated as shown in the above reaction.

- N of molecules in 1 mole = 6.022 × 10²³

- No. of moles of SO₂ liberated = 2

⇒ No. of molecules of SO₂ liberated = 2 × 6.022 × 10²³

⇒ No. of molecules of SO₂ liberated = 12.044 × 10²³