Question

what is a substance and homogenous mixture?

Answer 1

*A substance is matter which has a specific composition and specific properties. 
*
a mixture in which there same kind of substances are mixed

Answer 2

Hi !!!

This is your answer.

Substance :-
Substances are the pure form of matter of which mixtures are constituted.

Homogeneous mixture :-

A mixture is made of uniform composition of its constituents. There homogeneity at the particle level.

Hope it helps