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Atomic and Molecular Masses

Some Basic Concepts of Chemistry
Chemistry
Class 11

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Basics of Atomic Mass and Molecular Mass

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Formula unit mass for is :

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The modern atomic mass unit is based on the mass of :

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Formula unit mass of is :

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Complete the table given below:
ElementAtomic massMolecular massAtomicity number
Chlorine35.571-
Ozone-483
Sulphur32-8
Nitrogen14-2

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Haemoglobin contains of iron by mass. If the compound contains a single atom of iron then what is its molar mass in ?

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A solution of 0.640 g of azulene in 100.0 g of benzene boils at . The boiling point of benzene is ; the is . What is the molecular weight of azulene?

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An atom of an element is 10.1 times heavier than the mass of a carbon atom. What is its mass in a.m.u. ?

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Discuss the principle and the method of calculation of the following :
Volumetric method for the determination of molecular mass of acids and bases.

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Write true or false for the following statement:
One atomic mass unit is a mass unit equal to exactly one-twelfth (1/12th) the mass of one atom of carbon-12.

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The sum of masses of the atoms in the molecules is known as :

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