Quartz is a substance because the material has uniform properties throughout and is held together via chemical bonds.
Given :
Volume , V = 500 mL .
Molarity , M = 0.5 M .
Molecular mass of NaCl is
.
To Find :
How many grams of NaCl is required .
Solution :
Let , NaCl required is x gram .
Molarity is given by :

Hence , this is the required solution.
Answer:
Explanation: the answer is A