If you have 1.0 mole of each of the following compounds, which will have the most molecules? NI3 (nitrogen triiodide)
KCI (potassium chloride)
LiCl (lithium chloride)
C2H2 (ethyne)
They all have the same number of molecules.

11. phosphorus-32 is radioactive and has a half life of 14 days. how much of a 124 mg sample of phosphorus-32 is present after 56 days? a) 7.75 mg b) 15.5 mg c) 31.0 mg d) 62.0 mg

The element that has the greatest electronegativity is

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 .