Question

QI. Calculate the number of moles for the following:
(2) 22 g of carbon dioxide
(b) 12.044 x 10^23 number of water molecules
(Atomic mass of C = 12 u, O = 16 u, Avogadro number = 6.022 x 10^23]

Answer 1

Answer:

No. of moles=given mass/molecular mass

in case(2),No.of moles =22/12+2×16

=22/44=0.5 moles

No.of moles=given no.of molecules/Avogadro's no.

in case(b),No.of moles=12.044×10²³/6.022×10²³=2 moles

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