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(B) The molar mass of chlorine gas $(Cl_2)$ is $71 \ g/mol$.The number of moles of $Cl_2$ in $7.1 \ g$ is $\frac{7.1}{71} = 0.1 \ mol$.Number of molec

Vedclass · Accepted Answer

$\frac{N_A}{10} 	ext{ molecules}, \frac{N_A}{5} 	ext{ atoms}$

Vedclass · Answer

(B) The molar mass of chlorine gas $(Cl_2)$ is $71 \ g/mol$.The number of moles of $Cl_2$ in $7.1 \ g$ is $\frac{7.1}{71} = 0.1 \ mol$.Number of molecules = $	ext{moles} 	imes N_A = 0.1 	imes N_A = \frac{N_A}{10} 	ext{ molecules}$.Since each $Cl_2$ molecule contains $2$ atoms of chlorine,the number of atoms = $2 	imes 	ext{number of molecules} = 2 	imes \frac{N_A}{10} = \frac{N_A}{5} 	ext{ atoms}$.

The number of molecules and atoms present in $7.1 \ g$ of chlorine gas $(Cl_2)$ are respectively:

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