A 2.5 molar solution contains 0.97 g of NaOH. What would be the volume of this
solution in mL?

9.7 ml

Explanation:

Molarity = 2.5 M

Mass = 0.97g

Volume = ?

The relationship between these quantities is;

Molarity = Number of moles / Volume

Number of moles = Mass / Molar mass

Molar mass of NaOH = 40g/mol

Number of moles = 0.97 / 40  = 0.02425 mol

Volume = Number of moles / Molarity = 0.02425 / 2.5 = 0.0097 L

1000 ml = 1L

x = 0.0097 L

x = 0.0097 * 1000 = 9.7 ml

a corroding iron, if that's one of your choices