Which of the following substances is a compound?(1 point) Responses water (H2 O) water (H2O) carbon (C) carbon (C) oxygen (O) oxygen (O) gold (Au)
Water (H2O)
The substance "water (H2O)" is a compound.
To determine which of the following substances is a compound, we need to understand what a compound is. A compound is a substance that is made up of two or more different elements chemically combined in a fixed ratio.
Let's go through the options one by one and check if they meet the criteria:
1. Water (H2 O) - This is a compound because it consists of two different elements, hydrogen (H) and oxygen (O), chemically combined in a fixed ratio.
2. Water (H2O) - This is the same as option 1; it is also a compound for the same reasons.
3. Carbon (C) - Carbon is an element, not a compound. Compounds are made up of different elements, but carbon itself is not chemically combined with any other element in this case.
4. Carbon (C) - This is the same as option 3; it is also not a compound as it is a single element.
5. Oxygen (O) - Oxygen is an element, not a compound. Similar to carbon, it is not chemically combined with any other element in this case.
6. Oxygen (O) - This is the same as option 5; it is also not a compound as it is a single element.
7. Gold (Au) - Gold is an element, not a compound. It consists of only gold atoms and is not chemically combined with any other elements.
Based on the analysis, the compounds in the given options are water (H2 O) or water (H2O).