Plz answer it fast .. it's very urgent .. I will give brainliest for the right answer ..

If Robert Boyle is the first to use the term element .. Then who is the first to define the term element ? ​

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.