If you were to draw a particulate representation of air that contained 10 particles, how many of the particles you drew would be nitrogen? How many would be oxygen? Argon? Carbon dioxide?

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 .