Answer:
[tex]2.778 * 10^{22}[/tex]
Explanation:
Weight of NaCl is equal to sum of weight of one mole of sodium and one mole of chloride.
Mathematically, it can be represented as -
1 mol (Na) [tex]+[/tex] 1 mol (Cl) [tex]= 23.0 + 35.5 = 58.5[/tex] g/mol
In [tex]58.5[/tex] gram of NaCl, there is one mole of Na or [tex]6.02 * 10^{23}[/tex] ions
In one gram of NaCl, there will be
[tex]\frac{6.02 * 10^{23}}{58.5}[/tex] sodium ions
In [tex]2.7[/tex] grams of NaCl, the number of sodium ions will be -
[tex]\frac{6.02 * 10^{23}}{58.5} * 2.7[/tex]
[tex]2.778 * 10^{22}[/tex]
