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If the Avogadro number, is changed from this would change
(a)the relative ratio of number of moles of chemical species in a balanced equation.
(b)the relative ratio of number of moles of various elements in a compound.
(c)the definition of molar mass in units of grams.
(d)the mass of one mole of carbon.

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Important Questions on Some Basic Concepts of Chemistry
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Suppose the elements and combine to form two compounds and . When moles of weighs and moles of weighs , the atomic weights of and are

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Which symbol replaces the unit of atomic mass, amu?

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The weight of of oxygen at on liquefaction would be

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The largest number of molecules is present in

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The mass of a molecule of water is

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The modern atomic weight scale is based on

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Which of the following gives the correct order of increasing masses?
(Atomic mass: ).
I. molecule of oxygen.
II. atom of nitrogen.
III. molecular weight of oxygen.
IV. atomic weight of copper.

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What is the weight of oxygen required for the complete combustion of of ethylene?
