Answer: D. MIXTURE
Explanation:
It’s important, you first understand the meaning of a pure substance, an element, a compound and a mixture.
A pure substance is a material with a particular composition and consists of only one type of atom or compound. An example is pure sugar.
An element is a substance that cannot be broken down chemically and elements have just one symbol from the periodic table such as Carbon (C), Hydrogen (H).
A compound consists of two or more elements that are bonded chemically. For example, ammonia is a compound with a chemical formula NH3 which means it is means it is made up of 3 moles of Hydrogen and 1 mole of nitrogen.
A mixture contains two or more elements or compounds that are not bonded chemically. It can homogenous or heterogeneous. Examples are salt solution, sand, vinegar.
Vinegar is a mixture of two compounds water and acetic acid and can be separated by physical means because no chemical bond exists between water and acetic acid.
