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Question

Fill in the blanks:
(a) Molecular weight of a gas is twice its __________.
(b) Mass of 22.4 litre of a gas at STP is ___________.
(c) One gram atom of an element contains __________ atoms.
(d) One a.m.u. is the mass of __________ atom of C12.
(e) Avogadro's number is equal to _________.

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Solution

(a) Molecular weight of a gas is twice its vapour density.
(b) Mass of 22.4 litre of a gas at STP is molar mass.
(c) One gram atom of an element contains 6.023×1023 atoms.
(d) One a.m.u. is the mass of 112th atom of C12.
(e) Avogadro's number is equal to 6.023×1023.


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