<u><em>*(Answer)*=</em></u> An ion can have a positive or negative charge. Furthermore, it is a an atom or molecule with a net electric charge due to the loss or gain of one or more electrons.
<u><em>*(Request)*=</em></u> Searching the definition can help you find a definition faster.
Hope this helps
User who Answered: <u><em>BangtanBoyScouts</em></u>
0,15 moles of NaOH-------in------------1000ml
x moles of NaOH------------in--------100ml
x = 0,015 moles of NaOH
final volume = 150ml
0,015 moles of NaOH---in-------150ml
x moles of NaOH--------------in-----1000ml
x = 0,1 moles of NaOH
answer: 0,1mol/dm³ (molarity)