In a Macro-scale procedure, what techniques we can use to filter undissolved solid in the crystallization

In an energy pyramid, which level has the most available energy?

How are isotopes of the same chemical element alike? how are they different?

1. if you have a gas at 127 degrees c, what is it's absolute temperature (kelvin)? a. 200kb. 300kc. 400kd. 500k2. if you had a gas whose absolute temperature measured 45 k, what is that temperature in celsius? a. -228 cb. -300 cc. 125 cd. 112 c