Question

question 35 of 38 which of the following is an example of a pure substance? select the correct response: powder salt concrete salt water

Explanation:

A pure substance has a fixed - composition. Salt (sodium chloride) is a compound with a definite chemical formula ($NaCl$) and is a pure substance. Powder can be a mixture of different substances. Concrete is a mixture of cement, sand, gravel, etc. Salt water is a mixture of salt and water.

Answer:

salt