Iron is a pure substance. It's an element (Fe) and a bar of Iron is no mixture. If it was pure iron, then by definition it would be pure. However iron is rarely pure, it is usually in alloy with something.
No, Iron is a homogeneous mixture as long as the iron is pure
To turn a pure substance into a mixture, you can combine it with one or more different substances without altering its chemical identity. For example, mixing salt (a pure substance) with sand creates a mixture of salt and sand. The resulting mixture retains the individual properties of each component and can often be separated by physical means, such as filtration or evaporation.
pure substance?
Sand is not a pure substance - it can be a mixture of almost countless compounds. Sand and water is a mixture although, chemically speaking, the term mixture tends to be reserved for mixtures of components that are the same phase.
Mixture
Mixture
Iron is a pure substance. It's an element (Fe) and a bar of Iron is no mixture. If it was pure iron, then by definition it would be pure. However iron is rarely pure, it is usually in alloy with something.
Iron is an element, so it is a pure substance.
Iron sulfide is a pure compound. It can be as in aqueous medium too as a solution.
No, Iron is a homogeneous mixture as long as the iron is pure
The way you phrase that is a little dubious because no mixture is a 'pure substance'. However, compounds like iron sulphide that are actually bonded together areconsidered pure substances. The elements of a mixture are not united by a chemical change and can (in theory) be separated.
Table salt is a pure substance because it is composed of only one type of molecule, sodium chloride. Seawater is a mixture of different substances, including salt, water, and various dissolved ions. Sand is a heterogeneous mixture of minerals and particles, making it not a pure substance.
pure substance?
Sand is not a pure substance - it can be a mixture of almost countless compounds. Sand and water is a mixture although, chemically speaking, the term mixture tends to be reserved for mixtures of components that are the same phase.
Iron is an element. It is a pure substance that consists of only one type of atom, specifically iron atoms.
Sand added to water is a mixture. Sand is a solid substance composed of tiny particles, while water is a liquid. When sand is added to water, it does not undergo a chemical change and can be separated back into its original components.