Answer the following question given this paragraph: Iodine is added to alcohol and used as an antiseptic. It reacts with germs on cuts and wounds. Small amounts of iodine are also needed for good health. In the U. S. , iodine is added to table salt to prevent iodine deficiencies. Does the salt you use contain iodine?. Q: What is added to alcohol and used as an antiseptic? Choices: - chloride - arsenic - chlorine - iodine A:
iodine
(Question)
Answer the following question given this paragraph: The direct conversion of a solid to a gas, without an intervening liquid phase, is calledsublimation. The amount of energy required to sublime 1 mol of a pure solid is theenthalpy of sublimation (Hsub). Common substances that sublime at standard temperature and pressure (STP; 0C, 1 atm) include CO2 (dry ice); iodine (Figure 11.18 "The Sublimation of Solid Iodine"); naphthalene, a substance used to protect woolen clothing against moths; and 1,4-dichlorobenzene. As shown in Figure 11.17 "The Three Phases of Matter and the Processes That Interconvert Them When the Temperature Is Changed", the enthalpy of sublimation of a substance is the sum of its enthalpies of fusion and vaporization provided all values are at the same T; this is an application of Hess's law. (For more information about Hess's law, see Chapter 5 "Energy Changes in Chemical Reactions", Section 5.2 "Enthalpy"). Equation 11.3. Q: The direct conversion of a solid to a gas, without an intervening liquid phase, is called what? Choices: - amplification - isolation - insertion - sublimation A:
(Answer)
sublimation
Ques: Answer the following question given this paragraph: Summary The periodic table is an arrangement of the elements in order of increasing atomic number. Elements that exhibit similar chemistry appear in vertical columns calledgroups (numbered 118 from left to right); the seven horizontal rows are calledperiods. Some of the groups have widely used common names, including thealkali metals (group 1) and the alkaline earth metals (group 2) on the far left, and the halogens (group 17) and the noble gases (group 18) on the far right. The elements can be broadly divided into metals, nonmetals, and semimetals. Semimetals exhibit properties intermediate between those of metals and nonmetals. Metals are located on the left of the periodic table, and nonmetals are located on the upper right. They are separated by a diagonal band of semimetals. Metals are lustrous, good conductors of electricity, and readily shaped (they areductile and malleable), whereas solid nonmetals are generally brittle and poor electrical conductors. Other important groupings of elements in the periodic table are the main group elements, the transition metals, the lanthanides, and the actinides. Q: The periodic table is an arrangement of the elements in order of increasing what? Choices: - gravity numbers - metallic numbers - negative numbers - atomic numbers A:
Ans: atomic numbers
(Q).
Answer the following question given this paragraph: Trophic level 3 = secondary consumers that eat primary consumers. Q: What trophic level are secondary consumers (which eat primary consumers) considered to be? Choices: - trophic level 5 - trophic level 4 - trophic level 2 - trophic level 3 A:
(A).
trophic level 3
Ques:Answer the following question given this paragraph: Combustion reactions involve the reaction of a hydrocarbon with oxygen gas to produce water and carbon dioxide. Q: What involves the reaction of a hydrocarbon with oxygen gas to produce water and carbon dioxide? Choices: - hydrogen reactions - chemical reactions - material reactions - combustion reactions A:

Ans:combustion reactions
Question: Answer the following question given this paragraph: Living in a large colony requires good communication. Ants communicate with chemicals called pheromones . For example, an ant deposits pheromones on the ground as it returns to the nest from a food source. It is marking the path so other ants can find the food. Honeybees communicate by doing a "waggle dance. ". Q: Living in a large colony requires good communication. ants communicate with chemicals called what? Choices: - alkalides - hormones - peptides - pheromones A:
Answer:
pheromones