Answer:
Salts can be several different colors and may be any of the five tastes, including salty, sweet, bitter, sour or savory. Their odor depends on the acid and base it is comprised of. Salts comprised of strong acids and bases, called strong salts, are odorless.
An example of the substnce would be steel
Measuring the surface of an oil painting and finding its dimensions 12 to be 12 inches
A catalyst
A catalyst can be in many forms