Physical properties are : a. those properties which can be observed without changing the identity of the substance. b. those properties which include combustibilty, flammability, and reactivity. c. those properties which require a chemical reaction to be observed. d. all of these

Ionic compounds are made of ions, and yet the overall charge of an ionic compound is neutral. why?

How does the presence of oxygen affect the chemical pathways used to extract energy from glucose?

The characteristics of two different types of reactions are shown below: reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of an element. which statement is true about the atoms of the elements that participate in the two reactions? their identity changes in both reaction a and reaction b. their identity changes in reaction a but not in reaction b. their identity changes in reaction b but not in reaction a. their identity remains the same in both reaction a and reaction b.