Most people think that keeping onions in the fridge will prevent spoiling. This is false, onions should be kept it a dark, cool, dry place to prevent them from turning.
http://www.articlesbase.com/food-and-beverage-articles/keep-apple-slices-from-turning-brown-naturally-1238490.html
sprinkle with lemon juice
To keep them from drying out and turning brown
you don't
cause it gets pooped on
Yes it should. Potatoes turn brown when exposed to air. Covering them with any liquid should keep them from turning brown.
Oxygen. Dip apple slices in lemon juice to keep them from turning brown.
A hypothesis doesn't have to be a correct statement. Just pick a chemical and say this one will or will not keep the fruit from turning brown. Then give a brief statement about why you think this way.
keep it in the frige
will covering peeled potatoes in olive oil keep them from turning brown
Brown (or any ) onions come in a variety of sizes. There is no way to estimate their size without seeing them.
Use lemon juice.