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A compound that contains one atom of two atoms of and three atoms of , is made by mixing atoms of and atoms. Given that only of compound results. Calculate the atomic mass of if atomic masses of and are respectively.
(a)
(b)
(c)
(d)

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Important Questions on Some Basic Concepts of Chemistry
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A and B react to produce C according to the following chemical equation
A, B and C are the formulas for three gaseous substances. The vapour densities of A and B are 32 and 16 respectively. Find out the vapour density of C.

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

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

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Calculate:
How many gram atoms of sodium is present in sodium?

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