20 Systems in nature tend to undergo changes toward (1) lower energy and higher entropy (2) lower energy and lower entropy (3) higher energy and higher entropy (4) higher energy and lower entropy

Phosphoric acid, h3po4 (aq, is a triprotic acid, meaning that one molecule of the acid has three acidic protons. estimate the ph, and the concentrations of all species in a 0.300 m phosphoric acid solution. pka1: 2.16 pka2: 7.21 pka3: 12.

Which of the following words are examples of pollution? Select all of the correct answers Light Soil contamination Noise Water

What is the charge on he helium atom? Explain your reasoning. (A helium atom has two electrons, two protons, and two neutrons.)

Is the autoionization of water endothermic or exothermic?

How will the process of sedimentation affected, if sedimentation experiment is conducted on the surface of moon?

What type of process occurs when solidified wax is converted to liquid wax on heating? endothermic exothermic decomposition reversible disintegration

Density is not a physical property of mass. True False

Does skin have a nucleus true or false

Bacteria are only found in decaying matter. A. True B. False

Which is considered a chemical mutagen? tanning beds tobacco X-rays precious metals