Dentify some other substances (besides KCl) that might give a positive test for chloride upon addition of AgNO3. do you think it is reasonable to exclude these types of substances as contaminants that would give a false positive when you tested your reaction residue to verify that it is KCl

1. presence of either chloride, bromide, or iodide.

2. it is important to separate them to avoid contamination. Nevertheless, the substances have different colors when their salt precipitate is formed.

Explanation:

The precipitate formed by the addition of silver nitrate indicates the presence of either chloride, bromide, or iodide. Although the colors are different (AgCl white, AgBr cream, AgI yellow), they are difficult to distinguish and a specific ion test is needed to determine which one is present.

Silver nitrate (AgNO3) reacts with potassium chloride (KCl) and a white precipitate is formed.

what is the average time it took the car to travel 0.25 meters?

⇒ 2.23 seconds

what is the average time it took the car to travel 0.50 meters?

⇒ 3.13 seconds

the formula mass of a molecule or a compound is the sum of the atomic weights of the atoms in its empirical formula

(that's what i know about formula mass)