Which elements are known as d-block elements?

Find the number of grams of hcl needed to react completely with .50 moles of magnesium.

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.

If 3 moles of a compound use 24 j of energy in a reaction, what is the a hreaction in j/mol?