First slide

Numericals involving moles, molecules and atoms

Question

One mole of methane
A) contain five gram atoms
B) occupies 22.4 lit at STP
C) contain two moles of hydrogen atoms.
D) contain one gram atom of carbon
identify the correct statements from the above list

Moderate

A

A, B and D only
B

B, C and D only
C

B and D only
D

A, B, C and D

Solution

One mole of CH₄ :
contains N_A molecules.
contains 5N_A atoms.
contains 5 gram atoms.
contains 1 gram atoms of carbon.
contains 4 gram atoms of hydrogen.
contains 4 moles of hydrogen atoms.
occupies 22.4 lit at STP..

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