Which one of the following statements is inco | vedclass

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(B) $1$. For option $A$: Molar mass of $Al = 27 \ g/mol$. Number of moles $= \frac{27 \ g}{27 \ g/mol} = 1 \ mol$. Number of atoms $= 1 	imes N_A$ (A

Vedclass · Accepted Answer

$1 \ mole$ of atoms are present in $27 \ g-atom$ of $Al$.

Vedclass · Answer

(B) $1$. For option $A$: Molar mass of $Al = 27 \ g/mol$. Number of moles $= \frac{27 \ g}{27 \ g/mol} = 1 \ mol$. Number of atoms $= 1 	imes N_A$ (Avogadro's number). This statement is correct.$2$. For option $B$: The term '$27 \ g-atom$' refers to $27 \ moles$ of $Al$ atoms. Therefore,$27 \ moles$ of atoms are present,not $1 \ mole$. This statement is incorrect.$3$. For option $C$: Mass of $1 \ atom$ of $Al = \frac{	ext{Molar mass}}{N_A} = \frac{27}{6.022 	imes 10^{23}} \approx 4.48 	imes 10^{-23} \ g = 44.8 	imes 10^{-24} \ g$. The value $45.09 	imes 10^{-24} \ g$ is often used as an approximation or is considered incorrect based on standard $N_A$ values. However,option $B$ is fundamentally incorrect by definition of '$g-atom$'.$4$. Since the question asks for the incorrect statement,and $B$ is clearly incorrect,$B$ is the answer.

Which one of the following statements is incorrect?

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