1. An object sinks in a fluid. Is the fluid more dense or the object more dense? 2. Put these solutions in order in terms of increasing density: 10% NaCl, Water, Isopropyl alcohol.

13. a covalent bond between two atoms is likely to be polar if: a. one of the atoms is much more electronegative than the other. b. the two atoms are equally electronegative. c. the two atoms are of the same element. d. the bond is part of a tetrahedrally shaped molecule. e. one atom is an anion.

The bohr model of the atom explained why emission spectra are discrete. it could also be used to explain the photoelectric effect. which is a correct explanation of the photoelectric effect according to the model?

Why does ammonia, nh3, behave as a base when it reacts with an acid? z