Fundamentals of general, organic, and biological chemistry by John McMurry; et al

By John McMurry; et al

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The element nickel is a hard, shiny metal, and the compound hydrogen chloride is a colorless gas that dissolves in water to give a solution called hydrochloric acid. When pieces of nickel are added to hydrochloric acid in a test tube, the nickel is slowly eaten away, the colorless solution turns green, and a gas bubbles out of the test tube. The change in color, the dissolving of the nickel, and the appearance of gas bubbles are indications that a chemical reaction is taking place. Overall, the reaction of nickel with hydrochloric acid can be either written in words or represented in a shorthand notation using symbols, as shown below in brackets.

4 as you can. How many of them are listed as elements, and how many are included as part of chemical compounds? 62 Consider the recently discovered or as yet undiscovered elements with atomic numbers 115, 117, and 119. Is element 115 likely to be a metal or a nonmetal? What about element 117? Element 119? 63 How high would the atomic number of a new element need to be to appear under uranium in the periodic table? 52 Are the following statements true or false? If false, explain why. (a) H2O2 (d) N2 Which of the following elements is likely to be a metal and which a metalloid?

Is it a solid or a liquid at room temperature? [Aspirin A Case Study, p. 53 What is wrong with the following statements? Correct them. 46 The amino acid glycine has the formula C2H5NO2. What elements are present in glycine? What is the total number of atoms represented by the formula? 47 Benzyl salicylate, a chemical compound sometimes used as a sunscreen, has the formula C14H12O3. What is the total number of atoms represented by the formula? How many are carbon? 48 What is the formula for ibuprofen: 13 carbons, 18 hydrogens, and 2 oxygens.

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