In what type of reaction or process does heat flow into the system? combustion
exothermic
condensation
endothermic

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?

Why is permeable soil best for plants that need a lot of drainage?

Which atom or ion is the largest? a. k b. k+ c. ca d. ca2+ e. li