Question

A sample of copper with a mass of 63.5g contains 6.02 x10^23 atoms calculate the mass of an average copper atom

Answer 1

Answer:

The mass of an average copper atom is $1.0548\times 10^{-22}\ g$

Explanation:

Given:

The total mass of copper atoms, $m = 63.5\ g$

Number of atoms, $N=6.02\times 10^{23}$

Now, we are asked to find the mass of 1 copper atom.

We use unitary method to find the mass of 1 copper atom.

Mass of $N$ atoms = m

∴ Mass of 1 atom = $\frac{m}{N}$

Plug in 63.5 for 'm', $6.02\times 10^{23}$ for 'N' and simply.

Mass of 1 atom = $\dfrac{63.5}{6.02\times 10^{23}}=1.0548\times 10^{-22}\ g$

Therefore, the mass of an average copper atom is $1.0548\times 10^{-22}\ g$