Which of these can be used to identify metamorphic rocks? select all that apply.

Flourine is found to undergo 10% radioactivity decay in 366 minutes determine its halflife

When a septic tank backs up a goes in to clean it out

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.