How is a pure substance different from a mixture?

A. Pure substances cannot be separated by physical means.

B. Mixtures cannot be separated by physical means.

C. A pure substance is heterogeneous.

D. A mixture is made of one substance.

Describe the characteristics of the Sun (By the way I know that this is not chemistry, sorry about that)

What is the equation for the formation of ground level ozone?

What are the total electron pairs in AsH3

What state would water be in at the following temperatures: 45°c -24°c 125°c 75°c

In their Lewis Dot Structures, the halogen atoms would all have the same number of dots surrounding their symbols. A. True B. False

Which oxygen pachages materials and distributed them throughout the cell

How many atoms in 3 mol zn

Isotopes: are atoms of different elements which have the same mass are atoms of the same element with equal numbers of neutrons are atoms of the same element with different numbers of neutrons are atoms of the same element with equal numbers of

What would happen to the volume of a sample of gas if the temperature was decreased at the same time the pressure was increased?

How do the compounds that cause acid rain spread from their source?