Hydrogen bonds can occur in molecules where hydrogen is bonded to A. None of these
B. carbon
C. bromine or nitrogen
D. oxygen or nitrogen

In the following redox reaction which is the oxidizing agent and which is the reducing agent? alcl3 + na nacl + al

What are the similarities of physical and chemical change ?

Which of the following describes a compound? (hint: carbon and oxygen bo a. a piece of pure carbon, containing only carbon atoms b. oxygen gas surrounding a solid piece of carbon c. a substance made of two oxygen atoms for each carbon atom carbon and oxygen atoms mixed without being bonded together