2. Which of these objects has kinetic energy?

a. A ball moving through the air.

b. A ball sitting on a table.

c. A ball buried underground.

d. A ball sitting on the edge of a cliff.

Propane (C3 H8 (g), Hf = - 103.8 kJ/mol) reacts with oxygen to produce carbon dioxide (CO2, Hf = - 393.5 kJ/mol) and water (H2 O, Hf = - 241.82 kJ/mol) according to the equation below. What is the enthalpy of combustion (per mole) of C3 H8 (g) ? Use.

Which is one way that a short-term environmental change will most likely affect organisms within an ecosystem? O It will lead to larger populations. O It will lead to speciation. O It will lead to adaptation. O It will lead to forced migration.

Which element is malleable and conducts electricity? (1) iron (3) sulfur (2) iodine (4) phosphorus

In the following reactions first Identify the substance that is oxidized and the one that is reduced. Then identify the oxidizing and reducing agents. A. 2Li (s) + F2 (g) - - > 2LiF (s) B. Fe (s) + CuSO4 (aq) - - > FeSO4 (aq) + Cu (s)

Although Neptune is the farthest planet from the Sun, it travels in a fixed orbit around the Sun and never changes its path. What is the reason for this?

How do metallic bonds differ from covalent and ionic bonds

Will ag2so4 precipitate when 100 ml of 5.0*10-2 m agno3 is mixed with 10 ml of 5.0*10-2mna2so4 solution?

How many grams of H₂ are produced with the reaction of 36 grams of water? 2 Na + 2 H20 - > 2 NaOH + h2

Which statement is the best description of a chemical bond? A. A chemical bond connects 2 different molecules. B. A chemical bond holds atoms together. c. A chemical bond turns molecules into atoms. D. A chemical bond identifies atoms in a molecule.

The energy of an electron varies depending upon which energy level that electron occupies. True or False.