The gas, nitrogen, is found in dry air at sea level at a concentration of 78.1 percent by volume. What is the concentration of N, expressed in ppm?

One or more substances changing into one or more substances is an example of a

Which is a difference between molecular compounds and ionic compounds? select the correct answer below: question 5 options: molecular compounds typically form between a metal and a nonmetal, while ionic compounds typically form between nonmetals. molecular compounds result from the transfer of electrons between atoms to form ions, while ionic compounds result from the sharing of electrons between neutral atoms. molecular compounds are formed of discrete, neutral molecules, while ionic compounds are formed of large repeating arrays of opposite charges. molecular compounds have high melting points and high boiling points, while ionic

What is the ph of a solution that has a hydrogen ion concentration of 1.0 * 10 -9 m?