3. Arrange the following substances in order of increasing acidity: vinegar (pH = 2.8), gastric juices
from inside your stomach (pH = 2.0), and a soft
drink (pH = 3.4).

the answer is to check all of them! they all apply well at least i think so!

i think the answer is a and b

i wish you luck

answerdmitry mendeleyev made a workable classification of the elements

answergravity;