Chemistry, asked by na265517, 20 days ago

how many atoms of gold are in a gold nugget wit a mass of 4.25 grams

Answers

Answered by anushrimeshram8
1

Explanation:

Answer : The number of atoms of gold is, 1.32\times 10^{22}1.32×10

22

Explanation : Given,

Mass of gold = 4.25 g

Molar mass of gold = 196.96 g/mole

First we have to calculate the moles of gold.

\text{Moles of gold}=\frac{\text{Mass of gold}}{\text{Molar mass of gold}}=\frac{4.25g}{196.96g/mole}=0.022moleMoles of gold=

Molar mass of gold

Mass of gold

=

196.96g/mole

4.25g

=0.022mole

Now we have to calculate the number of atoms of gold.

As, 1 mole of gold contains 6.022\times 10^{23}6.022×10

23

number of gold atoms

So, 0.022 mole of gold contains 0.022\times (6.022\times 10^{23})=1.32\times 10^{22}0.022×(6.022×10

23

)=1.32×10

22

number of gold atoms

Therefore, the number of atoms of gold is, 1.32\times 10^{22}1.32×10

22

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