Question

Given that sodium chloride is 39.0% sodium by mass, how many grams of sodium chloride are needed to have 950.mg of na present?

Answer 1

39 % = 950 mg = 0.75 g
100 % = ?

? = 100 / 39 * 0.95 = 2.44g or 2.4358974 of NaCl

Answer 2

2.4358 grams of sodium chloride have 950.mg of sodium.

Step-by-step explanation:

Percentage of sodium in sodium chloride = 39.0 \%

Given mass of the sodium = 950 mg = 0.950 g

Let the mass of sodium chloride be M

Percentage of sodium:

`39.0\%=(0.950 g)/(M)* 100`

M = 2.4358 g

2.4358 grams of sodium chloride have 950.mg of sodium.