The metal wire in an incandescent light bulb glows when the light is switched on and stops glowing when it is switched off. this simple process is which kind of a change?

Measuring which physical property is most likely to produce the most precise results when trying to identify a substance

The characteristic 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 and element. which statement is true about the atoms of the elements that participate in the two reactions? a: their identity changes in both reaction a and b. b: their identity changes in reaction a but not b. c: their identity changes in reaction b but not a. d: their identity remains the same.

What is the mass of 0.46 mol of mgcl2