2. A scientist identified the element percentage of atoms in three unknown compounds. Compound X: 67% nitrogen and 33% oxygen, compound Y: 60% nitrogen
and 40% oxygen, and compound Z: 33% nitrogen and 67% oxygen.
B. Draw a model of each of the compounds (X, Y, and Z).
1.

16. in a reaction that has reached equilibrium, a. the forward and reverse reactions are occurring at the same rate. b. the reactants and products are in equal concentrations. c. the forward reaction has gone further than the reverse reaction. d. there are equal numbers of atoms on both sides of the equation. e. a, b, and d are correct.

Describe what happens to the molecules as water goes from ice to liquid to vapor. be sure to explain what happens to the temperature during the phase changes.

Read "who built the pyramids? ”. leave this link open while you answer the questions throughout the assignment. give at least two reasons why some people claim the pyramids of giza were constructed by aliens.