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Which statement describes H2O(ℓ) and H2O2(ℓ)?*
Carbon monoxide and carbon dioxide have*
Chemical properties can be used to*
Compared to the physical and chemical proper- ties of the compound NO2, the compound N2O has*
A sample of a substance has these characteristics: (cid:129) melting point of 984 K (cid:129) hard, brittle solid at room temperature (cid:129) poor conductor of heat and electricity as a solid (cid:129) good conductor of electricity as a liquid or in
an aqueous solution
This sample is classified as*
Which formulas represent one ionic compound and one molecular compound?*
Which terms identify two different categories of compounds?*
Which two terms represent major categories of compounds?*
The table below shows properties of two compounds at standard pressure.
Which statement classifies the two compounds?*
A solid sample of a compound and a liquid sample of the same compound are each tested for electrical conductivity. Which test conclusion indicates that the compound is ionic?*
Base your answers to questions 11 on the information below and on your knowledge of chemistry.
A laboratory technician is given the table below and a sample of one of the three substances listed in the table. The technician makes an aqueous solution with a portion of the sample. When a conductivity tester is lowered into the solution, the lightbulb on the tester glows brightly. Another portion of the sample is placed in a heat-resistant container that is placed in an oven at 450.°C. The sample melts.
State evidence that makes it necessary to use more than one property to identify the substance given to the technician.*
Base your answers to questions 12 on the information below and on your knowledge of chemistry.
Fatty acids, a class of compounds found in living things, are organic acids with long hydrocarbon chains. Linoleic acid, an unsaturated fatty acid, is essential for human skin flexibility and smoothness. The formula below represents a molecule of linoleic acid.
Identify the type of chemical bond between the oxygen atom and the hydrogen atom in the linoleic acid molecule.*
Base your answers to questions 13 on the information below and on your knowledge of chemistry.
The table below contains selected information about chlorine and two compounds containing chlorine. One piece of information is missing for each of the substances in the table.
Explain, in terms of electrons, why the compound containing calcium and chlorine is classified as an ionic compound.*
Base your answers to questions 14 on the information below and on your knowledge of chemistry.
The formula below represents a molecule of butanamide.
State the type of chemical bond between a hydrogen atom and the nitrogen atom in the molecule.*
Base your answers to questions 15 on the information below and on your knowledge of chemistry.
Potassium phosphate, K3PO4, is a source of dietary potassium found in a popular cereal. According to the Nutrition-Facts label shown on the boxes of this brand of cereal, the accepted value for a one-cup serving of this cereal is 170. milligrams of potassium. The minimum daily requirement of potassium is 3500 milligrams for an adult human.
Identify two types of chemical bonding in the source of dietary potassium in this cereal.*