Evaluate the expression for x=4 and y=3 4x-3y

Describe covalent and ionic bonding. include how it works, any key terms and how you can identify each bond (hard, soft, rigid, malleable)

What ions would you expect to find when an acid dissolves in water?

Which of the pairs of elements listed will form an ionic bond? a Potassium-Chlorine b Hydrogen-Carbon c Oxygen-Oxygen d Nitrogen-Fluorine

Two kittens are sleeping while curled up together. They are relying mainly on what kind of heat transfer? A. Thermal conduction B. Radiation warming C. Chemical heating D. Convection heating

Given the same conditions of temperature and pressure, which noble gas will diffuse most rapidly a. he b. ne c. ar d. kr

The diagram to the right shows energy for two reactions, A and B. Which reaction has the higher Gpx?

To be considered a source of water pollution, the source must include a chemical.

2,000 kJ worth of heat is absorbs by each of the following objects. Which object will experience the smallest temperature change

How are real gases different from ideal gases?

Which one doesnt belong in the list below? A. a meter B. one liter C. One centimeter D. one kilometer