When particles in a solid or liquid move faster they move slightly further apart. This is called expansion. *

Metallic bonds are good conductors of electricity true or false

Calculate the expected ph values of the buffer systems from the experiments (a,b,c,d), using the henderson- hasselbalch equation, ph-pka+log[a-]/[ha]. use for pka values carbonic acid= 6.37, and acetic acid= 4.75.

Flourine is found to undergo 10% radioactivity decay in 366 minutes determine its halflife