In general, when a substance says changes solid to liquid

Note the ph and poh values labeled with letters on the ph scale below. based on log rules and the way ph is calculated, what is the difference in [oh– ] concentration between point a and point b. a) 10^1 b) 10^5 c) 10^6 d) 10^7

Which substances have the lowest melting points: ionic covalent, or metallic

When an object falls through the air and encounters air resistance its overall speed will be than if it had not encountered air resistance? (one word answer)