Question

fill in the missing words

mole of zinc contains 6.022x10^23 atoms of zinc.
mole of silver contains 3.011x10^23 atoms of silver.

Explanation:

Step1: Recall Avogadro's number

One mole of any substance contains $6.022\times 10^{23}$ entities (atoms, molecules etc.). So for zinc, 1 mole of zinc contains $6.022\times 10^{23}$ atoms of zinc.

Step2: Calculate moles of silver

We know that the number of moles $n=\frac{N}{N_A}$, where $N$ is the number of atoms and $N_A = 6.022\times 10^{23}\text{ atoms/mol}$. Given $N = 3.011\times 10^{23}$ atoms of silver. Then $n=\frac{3.011\times 10^{23}}{6.022\times 10^{23}} = 0.5$ moles.

Answer:

1
0.5