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Relationship between Vapor Density & Relative Molecular Mass

What is the p...

Question

What is the percent composition by weight of Ag in $A g (N H_{3})_{2}^{+}$ ?
$. . A g (N H_{3})_{2}^{+} \to . . . A g^{+} + . . N H_{3}$

4.2

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19.7

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76.1

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80.3

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95.8

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Solution

The correct option is B 76.1
The atomic masses of Ag, N and H are 108 g/mol, 14 g/mol and 1 g/mol respectively.
The formula mass of $A g (N H_{3})_{2}^{+} = 108 + 2 \times (14 + 3) = 108 + 34 = 142$ g/mol.
The percent composition by weight of Ag in $A g (N H_{3})_{2}^{+} = \frac{108}{142} \times 100 = 76.1$ %.

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Similar questions

0.2 M

[A g {({N H}_{3})}_{2}] {N O}_{3}

A g {({N H}_{3})}_{2}^{+} ⇌ {A g}^{+} + 2 {N H}_{3}

K_{d i s s .} = \frac{[{A g}^{+}] {[{N H}_{3}]}^{2}}{[A g {({N H}_{3})}_{2}^{+}]} = 6.8 \times 10^{- 8}

A g^{+} + N H_{3} ⇌ A g (N H_{3})^{+}

K_{1} = 3.5 \times 10^{- 3}

A g (N H_{3}) + N H_{3} ⇌ [A g (N H_{3})_{2}]

K_{2} = 1.7 \times 10^{- 3}

[A g (N H_{3})_{2}]^{+}

A g^{+}

N H_{3}

A g (N H_{3})_{2}^{+}

. . . A g (N H_{3})_{2}^{+} \to . . . A g^{+} + . . . N H_{3}

A g^{+} + N H_{3} ⇌ [A g (N H_{3})^{+}]; k_{1} = 3.5 \times 10^{- 3}

[A g (N H_{3})]^{+} + N H_{3} ⇌ [A g (N H_{3})_{2}]^{+}; k_{2} = 1.7 \times 10^{- 3}

[A g (N H_{3})_{2}]^{+}

A g^{\oplus} + N H_{3} ⇌ [A g (N H_{3})]^{+}, K_{1} = 3.5 \times 10^{- 3} [A g (N H_{3})^{+} + N H_{3} ⇌ A g (N H_{3})_{2}]^{+}, K_{2} = 1.7 \times 1 -^{- 3}

[A g (N H_{3})_{2}]^{+}

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