Which one of the following will have largest number of atoms ?
(i) 1 g $A u$ (s)
(ii) 1 g $N a$ (s)
(iii) 1 g $L i$ (s)
(iv) 1 g of ${C l}_{2}$ (g)

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Solution

The number of atoms is directly proportional to the number of moles and is inversely proportional to the molar mass. The molar masses of $A u, N a, L i$ and $C l_{2}$ are 197 g/mol , 23 g/mol, 7 g/mol and 71 g/mol respectively.
Since the molar mass of $L i$ is minimum, it will have a maximum number of atoms.

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Which one of the following will have largest number of atoms?

(i) 1 g Au (s)

(ii) 1 g Na (s)

(iii) 1 g Li (s)

(iv) 1 g of Cl₂(g)

Q. Which one of the following will have the largest number of atoms?

(

Molar mass of

A u = 197 g / m o l)

Which one of the following will have the largest number of atoms? [Au=197,Na=23,Li=7,Cl=35.5 in amu]
(1) 1g Au(s) (2) 1g Na(s)
(3) 1g Li(s) (4) 1g Cl₂(g)

Q. Which of the following reaction(s) is/are exothermic for the formation of

N a F (s)

?
I.

N a_{(g)} \to N a_{(g)}^{+} + e^{-}

II.

F_{(g)} + e^{-} \to F_{(g)}^{-}

III.

N a_{(g)}^{+} + F_{(g)}^{-} \to N a F_{(s)}

Q. Which of the following reaction(s) is/are exothermic for the formation of

N a F (s)

?
I.

N a_{(g)} \to N a_{(g)}^{+} + e^{-}

II.

F_{(g)} + e^{-} \to F_{(g)}^{-}

III.

N a_{(g)}^{+} + F_{(g)}^{-} \to N a F_{(s)}

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Which one of the following will have largest number of atoms ?(i) 1 g Au (s) (ii) 1 g Na (s) (iii) 1 g Li (s)(iv) 1 g of Cl2 (g)

The number of atoms is directly proportional to the number of moles and is inversely proportional to the molar mass. The molar masses of Au,Na,Li and Cl2 are 197 g/mol , 23 g/mol, 7 g/mol and 71 g/mol respectively.Since the molar mass of Li is minimum, it will have a maximum number of atoms.

Which one of the following will have largest number of atoms ?
(i) 1 g $A u$ (s)
(ii) 1 g $N a$ (s)
(iii) 1 g $L i$ (s)
(iv) 1 g of ${C l}_{2}$ (g)