2. Calculate the mass percent of oxygen in dinitrogen
tetroxide, N2O4(ſ).

Use the periodic table to determine the electron configuration of dysprosium (dy) and americium (am) in noble-gas notation.

Ted and emily played a mixed doubles tennis match against jack and brenda. in the second match. ted and brenda played against jack and emily. which type of chemical reaction does the situation demonstrate?

Select all the correct answers.which compounds have the empirical formula ch20? (multiple answers)a.c2h4o2b.c3h603c.ch2o2d.c5h1005e.c6h1206