What is the relationship between reaction rate and reaction time

Significant figures are digits read directly from the measuring instrument plus one more digit, which is __ by the observer.

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.

What is happening when the water inside a kettle heats up and begins to boil