Which statements are true of heterogeneous mixtures?
1) They settle out.
2) The proportions of solute to solvent may vary.
3) The solute is evenly distributed throughout.
4) They are composed of two solvents and two solutes.
О 1 and 2
O2 and 4
O 3 only
O 2 only

What will most likely happen when two bromine atoms bond together?

The characteristics of two different types of reactions are shown below: reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of an element. which statement is true about the atoms of the elements that participate in the two reactions? their identity changes in both reaction a and reaction b. their identity changes in reaction a but not in reaction b. their identity changes in reaction b but not in reaction a. their identity remains the same in both reaction a and reaction b.

The ammonia molecule in the diagram has the observed bond orientation because