Which phrase describes a scientific theory?

3) How does air pressure change?

Match Match the action to the effect on the equilibrium position for the reaction N2 (g) + 3H2 (g) ⇌ 2NH3 (g). Match Term Definition Removing ammonia A) Shift to the left Removing hydrogen gas B) No effect Adding a catalyst C) Shift to the right

Which pair of atoms has the highest electronegativity difference? A. H - S B. H - Cl C. N - H D. O - H E. C - H

Which statement describes electrolysis? (1) Chemical energy is used to produce an electrical change. (2) Chemical energy is used to produce a thermal change. (3) Electrical energy is used to produce a chemical change.

7. Define electronegativity

How many protons are in an element

Which of the following is an example of oxidation? A. Charcoal is placed on a grill and lighting fluid poured over it. B. A car gets rusty over the course of a few years. C.

The metric unit of force is the A. gram. B. kilogram. C. nanometer. D. newton.

Why can endothermic reactions be spontaneous? g?

What requirements must a molecule meet in order to be considered nonpolar?