Asolution's ph is a measure of what? strength or weakness acid dissociation constant hydronium ion concentration molarity percent composition

What is the mass of 0.46 mil of mgcl2

At 20°c, a sample of h2o liquid and a sample of co2 gas each have the same average kinetic energy. why is one a liquid and the other a gas at this temperature?

Quickly what are the following of organisms that existed over a wide area but only for a limited time period called a.soft fossils b.mold fossils c.index fossils d.trace fossils