What is the concentration of a stock solution if 20 mL was used to make 400 mL of a 1.44 M solution? Which one is it?

5 M

50 M

40 M

30 M

Which statement correctly describes potassium iodide, ki? there is a one-to-one ratio of potassium ions to iodide ions. potassium gains electrons and iodine loses electrons during the reaction. the lattice is held together by potassium anions and iodide cations.

Astudent carefully transfers 30 g of water and 30 g of alcohol in a glass tube, forming two layers and filling the tube completely. after sealing the tube, the student mixes the solutions, and notices a bubble that forms in the tube. what is the mass of the contents in the glass tube after mixing?

‘which reaction would most likely require the use of an inert electrode?