What is a major problem with CFCs? 1. It isn't a good refrigerant.
2. It does not readily break down in the atmosphere.
3. It is toxic to breathe.
4. It is a greenhouse gas.

Which of the following statements is true about planck’s law

How many mmols of tris-hcl are there in 100 ml of a 100 mm tris-hcl buffer solution at ph 8.1? note that the 100 mm refers to the sum of tris and tris-hcl concentrations?

Which of the following is an indication that a substance has undergone a chemical change? a. no new product has been formed. b. the color of the substance has not changed. c. the original constitute has not changed. d. the molecular structure has changed.