Explanation:
Pure substances are distinct substances and are usually elements and compounds.
Impure substances are usually mixtures.
In terms of properties:
Pure substances are the same throughout i.e homogeneous whereas impure substances are either homogeneous or heterogeneous.
Separation techniques:
Pure substances cannot easily be separated by physical methods whereas impure substances can easily be separated into their constituents by physical methods.
Composition:
Pure substances have definite composition both macro and microscopically whereas impure substances have indefinite compositions as they are composed of two or more elements and compounds in any proportion by mass. Impure substances retain their identities i.e physical properties are retained.
Learn more:
Mixtures brainly.com/question/1446244
More on mixture brainly.com/question/1832352
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Answer:
B)the liquid level in a capillary tube will rise above the surrounding liquid and the surface in the capillary tube will have a concave meniscus
Answer:
The answer is oxygen and silicon
Explanation:
I took the test and it was right
the concentration of oxygen will be
concentration = K X partial pressure
K = Henry'a law constant = 2.28 × 10-3 mole/latm
Partial pressure of O2 = 0.21 (in atmosphere)
Concentration = 2.28 × 10-3 mole/latm X 0.21 = 4.788 X 10^-4 mol /L
