Which quantity of o2 contains exactly 3.01 x 10^23 atoms? and you! not looking for answers, i am really stuck on this one

What does the process of natural selection involve

3.) for each of the following compounds, draw the major organic product of reaction with hcl or naoh and circle whether the starting materials and products will be more soluble in organic solvent or water benzoic acid + hcl: benzoic acid + naoh: oh benzoic acid water/organic water organic fluorenone hс: fluorenone + naoh: fluorenone water/organic water/organic веnzocaine + hci: benzocaine + n»oh: h2n benzocaine water/organic water organic o=

List four observations that indicate that a chemical reaction may be taking place