The period number of any element is equal to the number of its energy levels true or false

An empty fuel tank can still contain and therefore can be even more dangerous than one full of liquid fuel.

What forms when chemical reactions combine pollution with sunlight?

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.