Question

1.what is mean by pure substance ??
2.what is meant by mass percentage of solution??
3. name the process of separation of immiscible liquid??​

Answer 1

Answer:

A substance that has a fixed chemical composition throughout is called a pure substance such as water, air, and nitrogen. A pure substance does not have to be of a single element or compound.

Explanation:

Mass percentage of a solution is a method to express the concentration or the amount of a component present in a given quantity of solution. The mass percentage of a component in a solution is defined as the mass of solute present per 100 grams of the solution.

Answer 2

Answer:

1. A substance that has a fixed chemical composition throughout is called a pure substance.

2. Mass percent is used as a way of expressing a concentration or a way of describing a component in a mixture. For a solution, the mass percent is expressed as the grams of solute divided by the grams of solution, then multiplied by 100 to get a percentage.

3. Decantation is a process for the separation of mixtures of immiscible liquids or of a liquid and a solid mixture such as a suspension.