Read the chemical equation. 2c2h2 + 5o2 → 4co2 + 2h2o which of the following statements would be correct if one mole of c2h2 was used in this reaction? one mole of oxygen was used in this reaction. five moles of oxygen were used in this reaction. four moles of carbon dioxide were produced from this reaction. two moles of carbon dioxide were produced from this reaction.

Two moles of carbon dioxide were produced from this reaction.

Explanation:

2C₂H₂ + 5O₂ → 4CO₂ + 2H₂O

All hydrocarbons burn in excess air or oxygen to give carbondioxie and water.

The general balanced equation is given by:

Cₓ Hₐ + (x+a/4)O₂ → xCO₂ + (a/2) H₂O

If given 1 mole of C₂H₂,

We know that x = 2

a = 2

For (x+a/4)O₂, we would have:

(2+2/4) = 5/2 O₂

For xCO₂, we would have 2CO₂

For (a/2) H₂O, we would have:

(a/2) H₂O = (2/2)H₂O = H₂O

Therefore, for 1mole of C₂H₂, the complete equation is written as

C₂H₂ + 5/2O₂ → 2CO₂ + H₂O

We can conclude that,

5/2 mole of O₂ would be used

2 mole of CO₂ would be produced

1 mole of H₂O would be produced

on passing the small ampere of electric current through the tube made of ar and hg of cfl generates uv rays which excites the fluorescent and thus emits the high radiation by consumption of just 5- 12 w in comparison to incandescent light which requires more power such as around 40 - 55 w to lighten.

moreover the life span of fluorescent or cfl is around 8000 h whereas the life span of incandescent is around 1200 h

hence, the building installed with incandescent lights bears more electricity bill.