The chemical properties of a substance relate to how matter reacts with decays into or physically changes into i need figuring out if it reacts with chemical properties or decays into or either physically changed into

Astudent carefully transfers 30 g of water and 30 g of alcohol in a glass tube, forming two layers and filling the tube completely. after sealing the tube, the student mixes the solutions, and notices a bubble that forms in the tube. what is the mass of the contents in the glass tube after mixing?

Which characteristics can be used to differentiate star systems? check all that apply.

How many protons, electrons, and neutrons are in each of the following isotopes? a. zirconium-90 b. palladium-108 c. bromine-81 d. antimony-123