ChemistryWiki | RecentChanges | Preferences
Here are the answer (in order) for Questions from Chem328MatterGeneralInformation Video:
1a) Mixture - more than one type of particle (base unit)
1b) Pure Substance - ONLY one type of particle (base unit)
2a) Two mixtures : Heterogeneous and Homogeneous
2b) Two substances: Element and compound
3a) Chocolate chip ice cream (Heterogeneous) and vanilla ice cream (Homogeneous)
3b) Argon (Ar) and Carbon dioxide (chemical formula is C1O2)
4) Two or more elements chemical combined in a fixed mass ratio. Carbon monoxide (chemical formula is C1O1)
5) Heterogeneous mixture have their different particles (components) UNEVENLY distributed while Homogeneous mixtures have their different particles EVENLY distributed.
6a) Colloid and 6b) Suspensions. Their different components DO NOT settle out (colloid) while suspensions different particles DO settle out.
7) Tyndal Effect occurs when the particle aggregate together in such a large group that it affects light passing by the group. Heterogeneous mixture have Tyndal Effect and Homogeneous mixtures DO NOT.
8) Homogeneous mixture
9a)Separation : techniques are different (physical-mixture, chemical-compound)
9b)Properties of substances that make it up ARE different from the resulting material properties (compound) or NOT (mixture).
9c) Composition: One is fixed (compound) and one can vary (mixture)