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1.2x10^23 gold atoms calculate into mass, in grams

Question

1.2x10^23 gold atoms calculate into mass, in grams

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Step 1

Given:

Number of gold atoms = 1.2 x 1023 atoms.

Molar mass of gold (Au) = 199.97 g/mol.

Step 2

Calculation for number of moles of gold:

6.023 x 1023 atoms -» 1 mole of gold
1.2 x 1023 atoms x moles
1.2 x 1023 atoms x 1 mole of gold
х-
6.023 x 1023 atoms
x 0.2 moles of gold
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6.023 x 1023 atoms -» 1 mole of gold 1.2 x 1023 atoms x moles 1.2 x 1023 atoms x 1 mole of gold х- 6.023 x 1023 atoms x 0.2 moles of gold

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Step 3

Calculation fo...

Mass
Number of moles =
Molar mass
number of moles x Molar mass
Mass
Mass 0.2 mol x 199.97 g/mol
Mass 39.93 g = 40g
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Mass Number of moles = Molar mass number of moles x Molar mass Mass Mass 0.2 mol x 199.97 g/mol Mass 39.93 g = 40g

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