Which of these is a pure substance? grape juice, salt water, table salt or gasoline?

Salt water = A heterogenous mixture of salt (NaCl) and water (H20).

Gasoline = Gasoline or petrol is a petroleum-derived liquid mixture consisting mostly of hydrocarbons and enhanced with benzene or iso-octane to increase octane ratings, primarily used as fuel in internal combustion engines

Table Salt = would be considered a pure substance.

Grape juice = is mixture

-Don

The pure substance among the given options is table salt.

To determine which of these is a pure substance, we need to understand the definition of a pure substance. A pure substance is a form of matter that has a fixed chemical composition and distinct properties. It consists of only one type of particle, either an element or a compound.

Now, let's analyze the options you provided:

1. Grape juice: Grape juice is a mixture because it is composed of multiple substances such as water, sugars, acids, and flavors. These components can be separated from each other.

2. Saltwater: Saltwater is also a mixture. It is composed of water and dissolved salt. While the water can be separated from the salt through a process called distillation, it cannot be considered a pure substance.

3. Table salt: Table salt, also known as sodium chloride (NaCl), is a pure substance. It consists of a fixed ratio of sodium and chloride ions. It has a distinct chemical composition and properties, and cannot be decomposed into simpler substances by physical means.

4. Gasoline: Gasoline is a complex mixture of hydrocarbons. It consists of various compounds such as octane, heptane, and additives. Therefore, it is not a pure substance.

Based on the analysis, the pure substance among the options provided is table salt (or sodium chloride).