1.

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

Answer»

`0.2`
`0.1`
`0.21`
`0.12`

Solution :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`


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