what is mole concepts in chem.? ex. and explain
Answers
Molecular Mass and Mole Concept
The study of atoms and its related traits lay the foundation for chemistry. Atomic mass is the concept related to a single atom, whereas molecular mass relates to a group of atoms. If you are planning to proceed with this concept, then it is necessary to gain precise knowledge about molecular mass and mole concept. Let us proceed!
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Atoms
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Molecular Mass
You can call the molecular mass of a substance as the relative mass of its molecule when compared with the mass of 12C atom considered as 12-units. In simple terms, it points out the number of times; 1 molecule of the concerned substance is weightier than an atom.
Calculation of Molecular Mass
Always remember that molecular mass is equivalent to the sum of atomic masses for all atoms available in a molecule of the target substance.
Relative Molecular Mass
RMM or Relative molecular mass is the molecular weight of an element or compound. You can call it as the number of times a single molecule of the substance stays heavier than the 1/12th mass of carbon atom (12C).
Gram Molecular Mass
Gram molecular mass of a substance is the molecular mass denoted in grams. For example, molecular mass for O2 = 32 Gram; the relative molecular mass as expressed in terms of grams. Do remember, relative atomic mass stays as a ratio and doesn’t have any units. On the other hand, gram molecular mass and gram atomic mass can be denoted in grams.
Concept of Mole
It is vital to note that, the identity of a substance not only contains the type of atoms but also the quantity of each atom type. In today’s time, we have access to sophisticated instruments which permit the direct measurement microscopic traits.
mole is the atomic mass of substance expressed in grams.
it is the amount of substance that contains as many particles of ntt's as there are atoms in exactly 12g of C- 12 isotope.
ex - 1 mole of H2 gas = 2grams
as atomic mass of 1 H is 1.
1 mole = 6.022× 10^23 atoms/molecules/particles/ions