Half-life is always given in units of time

Why do cells appear different in distilled water than they do in 10% salt water?

Which diagram shows the correct way to represent an ionic compound of magnesium oxide?

Calculate the ph at the equivalence point for the titration of a solution containing 150.0 mg of ethylamine (c2h5nh2) with 0.1000 m hcl solution. the volume of the solution at the equivalence point is 250.0 ml. kb forethylamine is 4.7 × 10−4 .