When testing the effect of caffeine on cardiac rate, Valerie used water fleas as her test subject. She placed 5 water fleas ia beaker #1 with 50 mL normal water,
then placed 5 water fleas in beaker #2 with 1 mL coffee and 50 mL water, 5 water
fleas in a petri dish with 5 mL coffee and 50 mL water, and 5 water fleas 10 mL of
coffee and 50 mL of water. In the experiment above, what is the purpose of
beaker #1? *

answer:

the answer is 6 valence electrons.

explanation:

valence is the # of electrons on the outer most shell of an atom.

oxygen has 6.

although, the valency of oxygen is 2, because it only needs to make 2 covalent bonds, or gain 2 electrons, to achieve the stable octet configuration of a noble gas.

that's it!

if you need further assistance, let me know: )

~ trueboss72

the dissolution of polymer can be thermodynamically described in 2 steps.