Gram Molecular Mass

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Gram atomic mass (Gram atom)

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Moles

Moles          It is the amount of a substance which contains the same number of chemical units as they are atom in excatly 12 grams of pure carbon -12 unit its unit is mol. For example                    We say that two moles if water is 36 g . It is written as 36g of water =2mol. Gram Atomic Mass                               ...

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Molecules

Molecules A molecules is the smallest particles of a substance which has independent existence.it consist of a single or more similar or more different atoms. Types There are four types of molecules: Monoatomic molecules Homoatomic molecules Hetroatomic molecules  Polyoatomic molecules   Monoatomic molecules                                      ...

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Avogadro's number

Avogadro's number                                 Avogadro's number  number of units in one mole of any substance (defined as its molecular weight in grams), equal to 6.022140857 × 1023. The units may be electrons, atoms or ions, or a molecules, depending on the nature of the substance...

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Molecular ion and Free Radical

 Molecular ion                         Molecular species having positive or negative charge.Molecules is a neutral species and have  same number of electrons and protons.but in  Molecular ions number of electrons and proton are not same.   Free Radical                    ...

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Chemical species

Chemical species    Chemical species are atoms, molecules, molecular fragments, ions,   etc., being subjected to a chemical process or to a measurement. Generally, a chemical species can be defined as an ensemble of chemically identical molecular entities that can explore the same set of molecular energy levels on a defined time scale.   The  common chemical species are :  Ions  Molecular Ions Free...

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