Question

calculate the mass of an atom of silver.(atomic mass=108)
2)1 molecule of Naphthalene.​

Answer 1

Q. calculate the mass of an atom of silver.(atomic mass=108)

calculate the mass of an atom of silver.(atomic mass=108)2)1 molecule of Naphthalene.

Ans :-

$mass \: of \: 1 \: atom \: of \: silver = 1.783 \times {10}^{ - 22} kg$

$mass \: of \: 1 molecule \: of \: naphthalene = 2.12 \times {10}^{ - 22} kg$

Explanation:-

$mass \: of \: 6.022 \times {10}^{23} atoms \: of \: silver \: = 108g$

$mass \: of \: 1 \: atom \: of \: silver \: = \frac{108}{6.022 \times {10}^{23} }$

$= 1.793 \times {10}^{ - 22} g$

2)

$molecular \: mass \: of \: naphthalene(c10 \: h8)$

$= 10 \times 12 + 8 \times 1 = 128$

$mass \: of \: 6.022 \times {10}^{23} molecules \: of \: naphthalene \: = 128g$

$mass \: of \: 1 \: molecule \: of \: naphthalene \: = \frac{128}{6.022 \times {10}^{23} }$

$= 2.12 \times {10}^{ - 22} g$