What is a pure substance? - Chemistry Stack Exchange
Yet another definition of a pure substance suggests that any material made of the same kind of atoms is a pure substance. So individual elements in the periodic table and stuff made "purely" of them are …
Why is water considered a pure substance instead of a mixture?
Dec 19, 2016 · A mixture is when two or more substances combine physically together. However, in water, two hydrogen atoms combine with one oxygen atom chemically, forming a new substance that …
What is a pure substance that is made of only one kind of atom?
Nov 26, 2024 · An element is a substance made of only one kind of atom. Each element has a unique atomic number, which represents the number of protons in its nucleus.
Is 24 carat gold a pure substance or a mixture? - Answers
Jan 22, 2025 · The term "24 carat" indicates that the gold is 99.99% pure, with trace amounts of impurities. This high level of purity makes it a pure substance rather than a mixture.
Is iron a mixture or a pure substance? - Answers
May 20, 2024 · Is a mixture of iron and sulfur a pure substance? The way you phrase that is a little dubious because no mixture is a 'pure substance'.
terminology - Can an element be a single atom or a molecule made up …
Sep 15, 2022 · Here is the more technical definition: 1-A species of atoms; all atoms with the same number of protons in the atomic nucleus. 2-A pure chemical substance composed of atoms with the …
Is the pacific ocean a pure substance? - Answers
May 21, 2024 · The density of a pure substance remains constant regardless of changes in mass or volume. Density is a physical property that is inherent to a substance and is calculated as mass …
Is coca cola an element compound or mixture? - Answers
Jan 19, 2025 · Is coca cola a pure substance or a mixture? Cola is a mixture (water, sugar, acid, plant extracts, color). Coca is the brand name, like Pepsi is.
What is the pure substance that cannot be broken down into ... - Answers
May 30, 2024 · An element is a pure substance that cannot be separated into simpler substances by physical or chemical means. Atoms are the smallest particles in which an element can be divided …
Is sand a mixture or a compound? - Chemistry Stack Exchange
Mar 26, 2017 · If you purified the sand, you could obtain a pure compound, but in general, natural deposits of sand have $\ce {SiO2}$ and a lot of other "stuff" (e.g. organic molecules, iron oxides, and …