Classify each substance as a pure substance or a mixture. If it is a pure substance, classify it as an element or a compound. If it is a mixture, classify it as homogeneous or heterogeneous.
(a) helium gas
(b) clean air
(c) rocky road ice cream
Pure substance is defined as when a substance is made up of only one type of element or one type of molecule and the composition of the substance remain same.
Homogeneous is a mixture where components are equally or uniformly distributed and the composition remain same throughout the mixture. In a an homogeneous mixture, only one phase of matter is observed. The mixture can not be able to separated.
On the other hand, Heterogeneous is a mixture where components are not uniform. The mixtures have different phase of states....