18. c
19. A
20. decomposition reaction
21. 4
22. 0.04%
13.) would be cytoskeleton and number 16.) would be lysosomes
+2, because Beryllium is in the Group II of the periodic table.
Hope this helps!
All the layers should be kept until the experiment is complete.
<h3>What is extraction?</h3>
In chemistry, solvent extraction is accomplished by adding a sample containing the substance to be separated into a system of two solvents, an aqueous layer and an organic layer.
It is important to note that all the layers should be kept until the experiment is complete. No layer ought to be discarded before the work is completed.
Learn more about solvent extraction:brainly.com/question/11041092
