Answer the following question given this paragraph: Low yields of nitric oxide, NO, form when heating nitrogen and oxygen together. NO also forms when lightning passes through air during thunderstorms. Burning ammonia is the commercial method of preparing nitric oxide. In the laboratory, the reduction of nitric acid is the best method for preparing nitric oxide. When copper reacts with dilute nitric acid, nitric oxide is the principal reduction product: 3Cu(s) + 8HNO 3(aq) 2NO(g) + 3Cu(NO 3) 2(aq) + 4H 2 O(l) Gaseous nitric oxide is the most thermally stable of the nitrogen oxides and is the simplest known thermally stable molecule with an unpaired electron. It is one of the air pollutants generated by internal combustion engines, resulting from the reaction of atmospheric nitrogen and oxygen during the combustion process. At room temperature, nitric oxide is a colorless gas consisting of diatomic molecules. As is often the case with molecules that contain an unpaired electron, two molecules combine to form a dimer by pairing their unpaired electrons to form a bond. Liquid and solid NO both contain N2O2 dimers, like that shown in Figure 18.34. Most substances with unpaired electrons exhibit color by absorbing visible light; however, NO is colorless because the absorption of light is not in the visible region of the spectrum. Q: Low yields of nitric oxide, no, form when heating nitrogen and oxygen together. no also forms when lightning passes through air during this? Choices: - tidal waves - snowstorms - tornadoes - thunderstorms A:
thunderstorms
(Question)
Answer the following question given this paragraph: Figure 29.3 Graphs of blackbody radiation (from an ideal radiator) at three different radiator temperatures. The intensity or rate of radiation emission increases dramatically with temperature, and the peak of the spectrum shifts toward the visible and ultraviolet parts of the spectrum. The shape of the spectrum cannot be described with classical physics. Q: The intensity or rate of radiation emission _________ with temperature? Choices: - randomly fluctuates - decreases - does not vary - increases A:
(Answer)
increases
Ques: Answer the following question given this paragraph: A mature sporophyte fern has the familiar leafy fronds. The undersides of the leaves are dotted with clusters of sporangia. Sporangia produce spores that develop into tiny, heart-shaped gametophytes. Gametophytes have antheridia and archegonia. Antheridia produce sperm with many cilia; archegonia produce eggs. Fertilization occurs when sperm swim to an egg inside an archegonium. The resulting zygote develops into an embryo that becomes a new sporophyte plant. Then the cycle repeats. Q: Sporangia produce spores that develop into tiny, heart-shaped what? Choices: - cells - tubules - filaments - gametophytes A:
Ans: gametophytes
(Q).
Answer the following question given this paragraph: Amino acids are the "building blocks" of proteins. There are 20 different common amino acids. The structural formula of the simplest amino acid, called glycine, is shown in Figure below . Other amino acids have a similar structure. The sequence of amino acids and the number of amino acid chains in a protein determine the protein's shape. The shape of a protein, in turn, determines its function. Shapes may be very complex. You can learn more about the structure of proteins at the URL below. Q: What are the "building blocks" of proteins? Choices: - hormones - enzymes - nucleic acids - amino acids A:
(A).
amino acids
Ques:Answer the following question given this paragraph: Q: What are the major sites of gibberellin production? Choices: - flower and fruit - soil and leaves - stem and roots - young roots and leaves A:

Ans:young roots and leaves
Ques:Answer the following question given this paragraph: Chemistry in Everyday Life Transition Metal Catalysts One of the most important applications of transition metals is as industrial catalysts. As you recall from the chapter on kinetics, a catalyst increases the rate of reaction by lowering the activation energy and is regenerated in the catalytic cycle. Over 90% of all manufactured products are made with the aid of one or more catalysts. The ability to bind ligands and change oxidation states makes transition metal catalysts well suited for catalytic applications. Vanadium oxide is used to produce 230,000,000 tons of sulfuric acid worldwide each year, which in turn is used to make everything from fertilizers to cans for food. Plastics are made with the aid of transition metal catalysts, along with detergents, fertilizers, paints, and more (see Figure 19.26). Very complicated pharmaceuticals are manufactured with catalysts that are selective, reacting with one specific bond out of a large number of possibilities. Catalysts allow processes to be more economical and more environmentally friendly. Developing new catalysts and better understanding of existing systems are important areas of current research. Q: What happens if a catalyst runs out? Choices: - variety slows - variety increases - reaction increases - reaction slows A:

Ans:
reaction slows