Free help with homework

Why join Brainly?

  • ask questions about your assignment
  • get answers with explanations
  • find similar questions


Decomosition reaction is single compound break into two or more simple substances under suitable conditions.
calcium carbonate is decomose by heating and form calcium oxide and carbon dioxide
CaCO3 -->  CaO + CO2       

displacement reaction in which a more reactive element displaces a less reactive element. 
 zinc react with hydrochloric acid and zinc displace the hydrogen and produce zinc chloride and hydrogen gas.
 Zn + 2HCl -->  ZnCl₂  + H₂ 
5 4 5
The Brain
  • The Brain
  • Helper
Not sure about the answer?
Learn more with Brainly!
Having trouble with your homework?
Get free help!
  • 80% of questions are answered in under 10 minutes
  • Answers come with explanations, so that you can learn
  • Answer quality is ensured by our experts