Answer:
B. 29.2 g
Explanation:
We are given a 0.5 M solution of NaCl with a volume of 1L.
We want to know how much sodium chloride in grams is needed in order to make this 0.5 M solution.
First, find how many moles are required.
[tex]1 L * \frac{0.5 mol}{1 L } = 0.5 mol[/tex]
Now, convert from moles to grams.
The molar mass of NaCl is 58.4 grams
[tex]0.5 mol * \frac{58.4 g}{1 mol} = 29.2 g[/tex]
So, the answer is B.