Hi, i am 15 and looking for a gf please don't be any younger then 14

Awhite powder is added to a solution. the images show observations made before the powder is added, just after the powder has been added, and a little while later. (the liquid in the small beaker is phenol red solution.) what evidence shows that a chemical change has taken place?

Aliquid solution can be made select all that apply. dissolving solids into liquids, mixing liquids, dissolving gas solutes into liquids , mixing gases, mixing solids

Why would a doctor most likely restrict a patient's contact with other people while the patient receives internal radiation