Final answer:
The solid powder composed of silver, nitrogen, and oxygen molecules is classified as a compound, because it consists of different elements that are chemically bonded together in a fixed ratio.
Step-by-step explanation:
If a solid powder is composed of molecules that contain silver (Ag), nitrogen (N), and oxygen (O), and all of the molecules are identical, this substance is classified as a compound. A compound is a substance that consists of two or more different elements that are chemically bonded together in a fixed ratio, and it possesses unique properties different from the elements that form it. Mixtures, on the other hand, do not have chemical bonding between their different components and can be separated into their original substances.
To further explain classifications:
- Salt (sodium chloride) is a compound.
- Pure water (H2O) is also a compound.
- Soil is typically a heterogeneous mixture, as it contains a variety of components with different compositions.
- Salt water is a homogeneous mixture, as the salt is evenly distributed throughout the water.
- Pure air is a homogeneous mixture of different gases.
- Carbon dioxide (CO2) is a compound.
- Gold (Au) by itself is an element, while bronze, being an alloy of copper and tin, is a homogeneous mixture.