Can someone please help

What does earth’s rotation on its axis cause? the tides night and day passing of years phases of the moon

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.

Ahypothesis must be testable and falsifiable to be considered scientific a. trueb. false