State one important difference between a physical change and a chemical change?

What is the ph of a solution with a concentration of 5.2 × 10–8 m h3o+?

What is the force of attraction between the particles in a salt crystal

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=