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Dmitriy789 [7]
3 years ago
15

What is the atomic mass of an element if 4.00 grams of it contains 2.98x1022 atoms ?

Chemistry
2 answers:
Klio2033 [76]3 years ago
5 0

Answer:

Atomic mass of the element = 80.80 amu

Explanation:

Given:

Mass of element = 4.00 g

No. of atoms = 2.98\times 10^{22}

mol = \frac{No.\ of\ atoms}{Avogadro's\ no.}

Avogadro's no. = tex]6.02\times 10^{23}[/tex]

mol = \frac{No.\ of\ atoms}{Avogadro's\ no.}

=\frac{2.98\times 10^{22}}{6.02\times 10^{23}} = 0.0495\ mol

Formula for moles in the terms of mass and atomic mass

mol = \frac{Mass\ in\ g}{Atomic\ mass} \\Atomic\ mass = \frac{Mass\ in\ g}{mol}

Atomic mass of the element = \frac{4.00}{0.0495} = 80.80\ amu

Atomic mass of the element = 80.80 amu

Sergeu [11.5K]3 years ago
3 0
Hope this helps you.

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