The chemical combination of two or more elements in fixed amounts is called a(n) a. orbit b. mixture c. molecule d. compound

Calculate the molar mass of aluminum oxide (al2o3). express your answer to four significant figures.

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.

What energy is it when you flip on a switch on a lamp