A pet store worker prepares a saltwater tank for fish by pouring ocean salt into a tank of pure water. How is the mass of the ingredients affected, according to the law of conservation of matter?

This statement is incorrect because it disregards the fact that the mass of the salt and the mass of the pure water are independent quantities. The mass of the salt will not equal the mass of the water unless the amounts of each are specifically measured to be the same, which is not the case in a general scenario.

This choice is also incorrect because it suggests that the mass of the salt alone is equal to the mass of the entire saltwater mixture. In reality, the mass of the saltwater mixture includes both the mass of the salt and the mass of the water, so this statement fails to account for the mass of the water.

This option is incorrect as it implies that the mass of the saltwater mixture is solely composed of the mass of the pure water. The saltwater mixture's mass includes both the water and the added salt, making this statement inaccurate.