What is the difference between elements with 13 protons and 13 neutrons and elements with 14 protons and 13 neutrons ?

Fossil fuels are organic compounds that are made from

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 .

Select the correct answer. wax is a nonpolar substance. in which type of substance is it the most soluble?