Which is a general chemical equation for an endothermic, double-replacement reaction?

Endothermic reaction is the chemical reaction in which energy is absorbed.

And a double displacement reaction is the one in which two elements displaces other elements and exchange places with each other.

So general chemical equation for an endothermic, double-replacement reaction is:  

AB + CD + energy >AD + CB  

Here energy is absorbed so it is an example of endothermic reaction.

While as two elements displaces other elements and exchange places with each other, so it is an example of  double displacement reaction.

Reactant + Heat → Products

Explanation: Hope this helps :)

in theory, limestone is composed principally of the compound calcium carbonate - caco3, but in reality this compound is deposited in conditions involving a number of other compounds as impurities so it ends up being a mixture of many compounds.

hope this : -)

tony (lordcaos066)

the answer is the first option

explanation:

just googled it m8. not that hard

lol