3 br 2 + 2fei3 = febr3+3i2 is what type of chemical reaction

single replacement reaction

Explanation:

the iron molecules would rather react with Bromine instead of Iodine. So, the iron molecules switch over to bromine leaving the iodine molecules by themselves.

i look it up online and i'll tell you

geosphere and hydrosphere.

this is because the geosphere has to do with geological events, while the hydrosphere controls all water on earth.