Donita is a firearms investigator. She collects evidence on a suspect’s skin and clothing for gunshot residue. Which of the following tests are best used for skin and which is best for clothing?

Iknow the answer to 13 is b and 14 is d. i just need to know why the correct answers are correct

In the following redox reaction which is the oxidizing agent and which is the reducing agent? alcl3 + na nacl + al oxidizing agent = reducing agent =

Magnesium is the limiting reactant in this experiment. calculate the theoretical yield of mgo for each trial. trial 1: trial 2: data mass of empty crucible with lid trial 1: 26.688 trial 2: 26.681 mass of mg metal, crucible, and lid trial 1: 26.994 trial: 2 26.985 mass of mgo, crucible, and lid trial 1: 27.188 trial 2: 27.180