Question

calculate the mass of an atom of silver.

1 molecule of naphthalene .

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Answer 1

$\huge\text{\underline{Answer}}$

we have to calculate the mass of a silver atom.

we know that,

Mass of $\bold{6.022 \times {10}^{23} }$ atoms of silver = 108 g

$\implies$Mass of One atom of silver =$\bold{\frac{108}{6.022 \times {10}^{23} } = 1.793 \times {10}^{ - 22} g }$

2)

Molecular mass of Naphthalene (C10H6) = 10 × 12 + 8 × 1 = 128

Mass of $\bold{6.022 \times {10}^{23} }$ molecules of Naphthalene = 128 g

$\therefore$Mass of 1 molecule of Naphthalene= $\bold{ \frac{128}{6.022 \times {10}^{23} } g }$

$\implies$ $\bold{ = 2.12 \times {10}^{ - 23} g }$

Answer 2

Answer:

The above written answer is correct