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28 votes
How many atoms are in 3.14g of copper

User Samirah
by
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1 Answer

22 votes
22 votes

Answer:

0.0494×6.02.10

23

= 2.974.10²²atoms

Step-by-step explanation:

A mole is the number of particles (atoms, molecules, ions) contained in a substance that is the same amount as many atoms in 12 gr C-12

1 mole = 6.02.10²³ particles

N = n x No

No = 6.02.10²³ = Avogadro's number

mol of Cu :

\begin{gathered}\tt atomic~mass~of~Cu=63.5~g/mol\\\\mol~Cu=\dfrac{3.14}{63.5}=0.0494\end{gathered}

atomic mass of Cu=63.5 g/mol

mol Cu=

63.5

3.14=0.0494

The number of atoms :

\tt 0.0494\times 6.02.10^{23}=\boxed{\bold{2.974.10^{22}~atoms}}0.0494×6.02.10 23= 2.974.10²² atoms

User Chinese Cat
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