(a)
Interpretation:
The mass of sample of air in grams should be calculated which consist of one mole of entities.
Concept introduction:
Number of moles is equal to the ratio of given mass to the molar mass.
The mathematical expression is given by:
Number of moles =
Molar mass of the molecule is equal to the sum of the masses of atoms present in the molecule.
Molecular formula is defined as the formula in which elements are present in actual numbers in a compound.
(b)
Interpretation:
The mass of krypton should be calculated which is obtained from one cubic meter of dry air.
Concept introduction:
Number of moles is equal to the ratio of given mass to the molar mass.
The mathematical expression is given by:
Number of moles =
Molar mass of the molecule is equal to the sum of the masses of atoms present in the molecule.
Molecular formula is defined as the formula in which elements are present in actual numbers in a compound.
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General Chemistry: Principles and Modern Applications, Loose Leaf Version (11th Edition)
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