Burning logs in the fire place produce heat energy. The dog gets warm from the fire when heat energy is transferred by A) the air. B) radiation. C) conduction. D) the flames.

Which of the following elements is most likely to have an oxidation state of + 2

Which is heavier - an equal volume of water or gasoline?

4.8 kg of sulfur dioxide contains how many molecules?

The names of the compounds FeS, NaCl, NaOH, and Pb (CN) 2 all end in the suffix a. - ide. b. - ite. c. - ate. d. - ic.

Which of the following could be considered a scientific statement? I believe there is life on other planets. I observed that bees prefer red flowers. I think cake tastes much better than cookies. I consider yellow a cheerful color.

Identify the spectator ions in the following complete ionic equation. 2k (aq) s2 - (aq) pb2 (aq) 2no-3 (aq) →pbs (s) 2k (aq) 2no-3 (aq) express your answers as ions separated by a comma.

4. A bird left its post and flew in a triangular path. It flew 21 yards south, 72 yards east and 75 yards diagonally to end back at the post. Is it a right triangle?

Condension occurs in the inside of your windows in Winters, why?

How can you use Hess's law to determine a reaction's enthalpy?

7. How much energy in KJ is released when 15.0 g of steam at 100.0 degrees Celsius is condensed and then frozen to ice at 0.0 degrees Celsius?