How many grams of a solid mixture containing strontium chloride would one need to make 558 mL of a 0.100 M strontium chloride solution, if the solid mixture contains 58.6% strontium chloride by weight

Answer 1

How many mols do you need? That's M x L = mols. 0l00 x 0.558 L = ?
Then grams = mols x molar mass = ?
That's grams you need if the SrCl2 is 100%. It isn't so you need ?g from above/0.586 = ??

Answer 2

6.62 g

Answer 3

8.85 g