How many miles of solute are required to make 90 liters of a 9.0 M solution? A).010 mol B)81 mol C) 100mol D) 91 Mol

C'mon. It's moles and not miles.

How many moles do you want ?
mols = M x L = ?
You know M and you know L, solve for mols.
I don't see the right answer listed.