In the pot of tea the molecules would be moving faster than in the cooled cup of tea. As liquid is heated the atoms vibrate faster which increases the distance between them. When heat leaves a substance, the molecules vibrate slower and get closer.
Counting gives an exact number and exact numbers have infinite sig figs.
You need .556M HCL to neutralize that
It’s most likely missing water
plants need to be watered in order to survive
It’s ionic bond based on electrons gain/loss.