Question

1. how many atoms are there in 1 mole of nacn?

Explanation:

Step1: Determine the formula units in 1 mole

1 mole of any substance contains Avogadro's number of formula units, which is \(N_A = 6.022\times 10^{23}\) formula units per mole. For \(\text{NaCl}\), 1 mole of \(\text{NaCl}\) has \(6.022\times 10^{23}\) formula units of \(\text{NaCl}\).

Step2: Determine atoms per formula unit

In one formula unit of \(\text{NaCl}\), there is 1 \(\text{Na}\) atom and 1 \(\text{Cl}\) atom, so total of \(1 + 1=2\) atoms per formula unit.

Step3: Calculate total atoms

To find the total number of atoms in 1 mole of \(\text{NaCl}\), we multiply the number of formula units by the number of atoms per formula unit. So, total atoms \(= 6.022\times 10^{23}\text{ formula units/mol}\times2\text{ atoms/formula unit}\)
\(= 1.2044\times 10^{24}\) atoms

Answer:

The number of atoms in 1 mole of \(\text{NaCl}\) is \(\boldsymbol{1.204\times 10^{24}}\) (or more precisely \(1.2044\times 10^{24}\))