I would personally say a Controlled Variable because you are purposefully not spraying the other arm.
Answer: The physical properties of iron oxide are that it is an odorless, red-brown solid, and that it is insoluble. Depending on the chemical formula, one of the chemical properties is its combustibility. If the chemical formula is Fe2O3, it is not combustible. If the formula is FeO, it is readily combustible.
Answer:
have you tasted acid?
Explanation:
also the taste of salt is sour.
The starting substances in a chemical reaction are called reactants - they are written on the left side of a chemical equation.
