Question

hey! guys please answer it was very very important...​

Answer 1

Answer:

what is meant by a substance

Explanation:

A substance is a pure single form of matter. It cannot be separated into other kinds of matter by any physical process. The substance must be composed of atoms and molecules. The substance must have a particular amount of weight, mass and volume.

list point of difference between homogeneous and heterogenous mixture

refer to the attached picture

hope it helps you ❣️❤

Answer 2

Answer:

Here your answer -

Ans1. A substance is a pure single form of matter. It cannot be separated into other kinds of matter by any physical process. For example Sugar, sodium chloride.

Ans.2 Homogeneous Mixture-

i. They have uniform composition.

ii. The components of homogeneous mixtures are not physically distinct.

iii. They have no visible boundaries of separation between the constituents.

iv. Examples. Alloy, Solution of salts in water, etc.

Heterogeneous Mixture-

i. They have no uniform composition.

ii. A heterogeneous mixture has physically distinct.

iii. They have visible boundaries of separation between the constituents.

iv. Examples. Mixture of sand and common salt, Mixtures of sand and water, etc.

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