What is the percent by mass of chlorine in nacl? 35.45% 39.34% 60.66% 70.90%

What is a scientific theory? a. a scientist's guess about how something works b. the results of an experiment obtained using the scientific method c. a proven fact that will never change d. an idea that is backed by data from many sources

Explain why scientists use shared characteristics to make cladograms.

In an exothermic reaction the bonding energy of the product is: less than the reactants same as the reactants greater than the reactants dependent upon the presence of a catalyst