When coach kwan notices that a player is getting tired, she takes out the tired player and substitutes a fresh player. which type of chemical reaction does this best model? replacement decomposition synthesis oxidation

replacement

Explanation:

Chemical reaction can be classified into various forms like decomposition reaction, replacement reaction, oxidation reaction, combustion reaction , synthesis reaction etc.

The best model that fits this scenario of substituting a player on the pitch  is the replacement reaction.

A replacement reaction occurs when element switched ion in a compound. A replacement reaction occurs when element displace another element in it compound. The very reactive non metal element will displace  another less reactive non metal element in it compound while a more reactive metal element will replace a less reactive metal element from it compound. An example is when fluorine replace Bromine in it compound or when Na replace hydrogen in it compound.

Na + HCl → NaCl    

this one is confusing

explanation:

idk

answer: i would say the brain but it seem that you have a brain.