Sodium chloride contains 60.68% chlorine by mass. If 7.1 g chlorine is made to react with 5.2 g of sodium, the number of moles of sodium which reacted with `Cl_(2)` is

Options

A. `0.2`
B. `0.1`
C. `0.21`
D. `0.12`

Answer

A

Explanation

Percentage of sodium `= 100 -60.68 = 39.32`
60.68 chlorine react with sodium
= 39.32 g
7.1 g of chlorine react with sodium
`= ((39.32g)xx(7.1g))/(60.68)`
`= 4.60 g`
Moles of sodium ` = (4.60g)/(23 g mol^(-1)) = 0.2 mol`