You asked: What is Mole concept in chemistry class 11?

Mole Concept – Some Basic Concepts of Chemistry – Class 11. … A mole is defined as that amount of substance which contains Avogadro’s number of atoms if the substance is atomic or Avogadro’s number of molecules if the substance is molecular. 1 mole of carbon atoms = 6.022 ×1023 atoms of carbon.

What is Mole concept in chemistry?

A mole is defined as the amount of substance containing the same number of discrete entities (atoms, molecules, ions, etc.) … Consistent with its definition as an amount unit, 1 mole of any element contains the same number of atoms as 1 mole of any other element.

What is mole in chemistry class 11?

A mole can be defined as the amount of substance that contains the same number of chemical entities (atoms, ions, molecules, etc.) as there are in 12 g of Carbon-12 isotope, as defined by the General Conference on Weights and Measures.

What is Mole concept example?

For example, a mole of water contains NA number of H2O molecules. However, each water molecule contains 2 hydrogen atoms and one oxygen atom. Therefore, one mole of H2O contains 2 moles of hydrogen and one mole of oxygen.

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What is Mole concept and molar mass Class 11?

The mass of one mole of a substance in grams is called its molar mass. The molar mass in grams is numerically equal to atomic /molecular/formula mass in u. … Molar mass of water (H2O) = 18.02g. Molar mass of carbon (C) = 12g. Molar mass of sodium chloride (NaCl) = 58.5g.

What is meant by 1 mole?

A mole is the amount(10) of material containing 6.02214 × 1023 particles. 1 mol = 6.02214 × 1023 particles. This number is also called Avogadro’s number… … Notice that the definition of the mole is an amount of substance.

Is Mole concept difficult?

As a theoretical concept, the mole concept is a challenging component of the chemistry curriculum. … However, this case study is not typical of the teaching and learning of all chemistry concepts we studied.

Who gave mole concept?

The more restricted use of the term molar to mean not just any macroscopic sample but rather one whose mass in grams directly reflects the mass of its constituent molecules, as well as use of the noun “mole”, is usually attributed to the German physical chemist, Wilhelm Ostwald (1853–1932), and appears in several of …

What is the importance of mole?

THE mole is important because it allows chemist to work with a subatomic world with macro world units and amount. Atoms molecules and formula units are very small and very difficult to work with usually. However the mole allows a chemist to work with amount large enough to use.

What is Valency class 9th?

Valency. It is the ability of an atom to gain or lose electron in order to achieve the noble gas configuration. It refers to the ability of an element to combine with other element. It is obtained by determining the number of electrons in the outermost shell (also called valence shell) of each atom of an element.

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What is Mole on human body?

Moles are a common type of skin growth. They often appear as small, dark brown spots and are caused by clusters of pigmented cells. Moles generally appear during childhood and adolescence. Most people have 10 to 40 moles, some of which may change in appearance or fade away over time.

Why can’t you see an atom with the naked eye?

Hint: There are some microscopic particles that can’t be seen from our vision because they are very tiny or smaller in size. Atoms can’t be seen from our naked eyes because of the same reason and also, they do not exist independently.

What is a mole Byjus?

A mole of a substance is referred the mass of substance containing the same number of fundamental units as there are atoms in exactly 12.000 g of 12C. … Its symbol is mol. In other words it can also be expressed as 1 mol of carbon-12 has a mass of 12 grams and contains 6.022140857 x 1023 of carbon atoms.

What is difference between molar mass and mole?

Expression of molar mass is grams per mole. It can also be expressed as kilogram per mole.

Molar mass:

Difference between Molar mass and Molecular mass
Example: Mass of 1 mole of oxygen is 15.9994 grams. Therefore, the molar mass = 15.9994 g/mol Example: Molecular mass of Ca(OH)2 = 74 atomic mass units
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