1.75 moles of Solute or 1.75n.
To find this, you'll need to use the molarity equation which is M = [tex]\frac{n}{v}[/tex]
List the given items to organize better:
M (Molarity) = .35
V (Volume) = 5L [must always be in Liters]
n (Moles) = ?
Now, for the equation, substitute the variables with the given numbers:
.35 = [tex]\frac{n}{5}[/tex]
Isolate the variable by multiplying the volume, 5, onto both sides. This will give you the answer of:
1.75 = n
Hope this helps!