Naturally occurring boron (B) contains 80.0% 11B (11.01 amu) and 20.0% 10B (10.01 amu). Calculate the average atomic mass of boron in amu. (10.81 amu)

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

Joan writes four numbers on the board in standard form, and then she writes their scientific notation

If 3 moles of a compound use 24 j of energy in a reaction, what is the a hreaction in j/mol?