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Average atomic mass of magnesium is amu. This Mg is composed of mole % of 24Mg and remaining mole % of 25Mg and 26Mg. Calculate the mole % of 25Mg?
(a)
(b)
(c)
(d)

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Important Questions on Some Basic Concepts of Chemistry
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Calculate:
How many gram atoms of sodium is present in sodium?

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[Given: of acetic acid molar mass of acetic acid , Neglect any changes in volume]

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Calculate:
Mass of 5 gram atoms of calcium.
[Hint: Gram atoms mass: ]

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