Which is the best description of what happens in a chemical reaction? A. Atoms rearrange. B. Atoms change into other atoms. C. Matter is destroyed. D. Matter is formed.

Why isn't the atomic number needed for notations such as carbon-14?

Briefly explain why experiments having faulty design or inconsistent data are problems for scientists. List several reasons.

Raw meat can spread pathogens. Which statement describes the best way to prevent the spread of foodborne illness? A. Use a paper towel to wipe off everything that the meat touched. B. Rinse your knives and cutting board with water. C.

33.23 grams of a thin sheet of iron is completely oxidized in 7 days. How would you express the rate of conversion of the silver? .0440 moles/day .183 moles/hour .0440 moles/week .308 moles/day

Two of the main dangers for the icebreaker ship Polarstern during their year-long stay in the frozen Arctic ocean are 1) the ship being crushed by the frozen ice and 2) polar bears. True False

Water is a great solvent. For example, it causes ionic compounds like sodium chloride (table salt) to dissociate. One of these reasons that water does is because it is polar molecule.

For most compounds with a single keto group in the molecule, equilibrium favors the keto form over the enol form of the compound. this is due largely to what?

The partial negative charge in a molecule of water occurs because the electrons shared between the oxygen and hydrogen stoms spend more time around the oxygen atom nucleus than around the hydrogen atom nucleus?

An electron moved from a higher energy level to a lower energy level. What most likely happened during the transition?

As the average kinetic energy of the particles in a gas increases, which of the following occurs? The temperature of the gas increases. The temperature of the gas decreases. The number of particles increases. The number of particles decreases.