Question

How many Na ions are in 2.7 g of NaCl?
Answer in units of ions.

Answer 1

`2.778 * 10^(22)`

Step-by-step 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)
`+` 1 mol (Cl)
`= 23.0 + 35.5 = 58.5` g/mol

In
`58.5` gram of NaCl, there is one mole of Na or
`6.02 * 10^(23)` ions

In one gram of NaCl, there will be

`(6.02 * 10^(23))/(58.5)` sodium ions

In
`2.7` grams of NaCl, the number of sodium ions will be -

`(6.02 * 10^(23))/(58.5) * 2.7`

`2.778 * 10^(22)`