Question

Calculate the number of mole of NaOH needed to prepare 250 mL 0.30 M NaOH solution. (Relative Atomic Mass: Na = 23.0; H = 1.0; O = 16.0]

A)75.00 mol

B)0.833 mol

C)1.200 mol

D) 0.075 mol ​

Answer 1

The answer is letter D. 0./75 mol

Step-by-step explanation:

Explanation: It's a 3.0 M solution so 1 litre of solution contains 3 moles of NaOH. 250 ml of solution therefore contains 0.25 x 3 = 0.75 moles of NaOH.