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Explain the mixtures and compounds
Mixture
Compound
1. Mixtures are made from 2 or more substances which are not chemically combined together.
2. Constituents can be separated by physical methods easily
3. Physical properties (colour, density etc.) are an average of the substances present in a mixture.
4. No energy changes occur when the mixture is formed.
5. Composition of the mixture may differ.
6. A mixture has no specific melting point or boiling point.
7. The constituent substances retain their chemical properties originally.
A compound is formed when 2 or more substances are chemically combined together.
Elements forming the compound can be separated chemically.
Physical properties are different from the elements forming it.
Formation of the compound is associated with energy changes (heat, light etc.).
Ratio of elements in the compound is always constant.
A compound has a fixed melting point and boiling point.
A compound possesses unique chemical properties.
describe graphical explanation of cryoscopy?
Correct statement is: (1) K=4s 1 , Cr= 3d 4 4s 2 , Cu= 3d 10 4s 2 (2) K=4s 2, Cr= 3d 4 4s 2 , Cu= 3d 10 4s 2 (3) K=4s 2 Cr= 3d 5 4s 1 , Cu= 3d 10
why we take carbon 12 as standard?
synthesis, posted date 1/12/2013 7;26;41 pm\location ;austeralia
what is allyl componund
Use the given data to construct a thermodynamical Born-Haber-cycle of the formation of potassium chloride from its elements and calculate the lattice energy of potassium chloride.
WHAT are the properties of group13 elements?
This cycloaddition reaction involves sixteen electrons; hence, it must be suprafacial on one component and antarafacial on the other. Thus, it must be a [14s + 2a] or a [14a + 2s]
principles of GCMS
#how to balance equations
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