Question

Given that sodium chloride is 39.0% sodium by mass, how many grams of sodium chloride are needed to have 750. mg of sodium present

Answer 1

Given :

Sodium chloride is 39.0% sodium by mass.

To Find :

How many grams of sodium chloride are needed to have 750. mg of sodium present.

Solution :

750 mg sodium = 0.75 gm sodium.

Since, sodium percentage is 39.0% .

39 gm of sodium is present in 100 gm of NaCl.

Let, mass of NaCl required is x.

So, mass of NaCl required to produce 0.75 gm of sodium is :

`39x = 100* 0.75\\\\x = (75)/(39)\ g\\\\x = 1.92\ gm`

Therefore, mass of NaCl required is 1.92 gm.

Hence, this is the required solution.