Problem 1PE: Practice Exercise 2.11
How many atoms of each element are expressed by the following formulas?... Problem 2PE Problem 3PE: How many atoms of each clement appear on each side of the arrow in the following equation? Is this... Problem 4PE Problem 5PE Problem 6PE Problem 7PE Problem 8PE: Write the formulas for the compounds made from (a) Ca and N, (b) Al and Br, (c) K and S, (d) Cs and... Problem 9PE: Practice Exercise 2.9 Write all the formulas for the chlorides and oxides formed by (a) chromium and... Problem 10PE Problem 11PE Problem 12PE: Practice Exercise 2.12
Write the formula for the ionic compound formed from (a) potassium and... Problem 13PE Problem 14PE Problem 15PE Problem 16PE Problem 17PE Problem 18PE: Write the formulas for (a) potassium chlorate, (b) sodium hypochlorite, and (c) nickel(II)... Problem 19PE Problem 20PE Problem 21PE: Practice Exercise 2.21
Name the following compounds using Greek prefixes when needed: (a) (b) (c) ,... Problem 22PE: Practice Exercise 2.22
Write formulas for the following compounds: (a) arsenic pentachloride, (b)... Problem 23PE Problem 24PE Problem 1RQ: 2.1 In the compounds formed by with chlorine, how many atoms of Cl are there per atom of each... Problem 2RQ Problem 3RQ Problem 4RQ: 2.4 In the refining of copper, sizable amounts of silver and gold are recovered. Why is this not... Problem 5RQ: 2.5 Why would you reasonably expect cadmium to be a contaminant in zinc but not in silver?
Problem 6RQ: 2.6 Using the symbol for nitrogen, 147N02, indicate what information is conveyed by the two... Problem 7RQ: Make a rough sketch of the periodic table and mark off those areas where you would find (a) the... Problem 8RQ Problem 9RQ Problem 10RQ Problem 11RQ: Which nonmetals occur as monatomic gases (i.e., gases whose particles consist of single atoms)? Problem 12RQ Problem 13RQ: Which physical property of metalloids distinguishes them from metals and nonmetals? Problem 14RQ: Sketch the shape of the periodic table and mark off those areas where we find (a) metals, (b)... Problem 15RQ: Most periodic tables have a heavy line that looks like a staircase starting from boron down to... Problem 16RQ Problem 17RQ Problem 18RQ Problem 19RQ: 2.19 What are two ways to interpret a chemical symbol?
Problem 20RQ Problem 21RQ Problem 22RQ: 2.22 Atoms of which elements are usually represented by the following drawings? Give their names and... Problem 23RQ: 2.23 Atoms of which elements are usually represented by the following drawings? Give their names and... Problem 24RQ: A DNA molecule is small in actual size but contains an enormous number of atoms. Surprisingly, the... Problem 25RQ: What do we mean when we say a chemical equation is balanced? Why do we balance chemical equations? Problem 26RQ: 2.26 For a chemical reaction, what do we mean by the term reactants? What do we mean by the term... Problem 27RQ: 2.27 The combustion of a thin wire of magnesium metal (Mg) in an atmosphere of pure oxygen produces... Problem 28RQ: Describe what kind of event must occur (involving electrons) if the atoms of two different elements... Problem 29RQ: With what kind of elements do metals react? Problem 30RQ: What is an ion? How does it differ from an atom or a molecule? Problem 31RQ: 2.31 Why do we use the term formula unit for ionic compounds instead of the term molecule? Can we... Problem 32RQ Problem 33RQ Problem 34RQ: 2.34 How many electrons has a titanium atom lost if it has formed the ion Ti4+? What are the total... Problem 35RQ: 2.35 If an atom gains an electron to become an ion, what kind of electrical charge does the ion... Problem 36RQ: 2.36 How many electrons has a nitrogen atom gained if it has formed the ion N3-? How many protons... Problem 37RQ Problem 38RQ Problem 39RQ Problem 40RQ Problem 41RQ: 2.41 What are the formulas (including charges) for (a) cyanide ion, (b) ammonium ion, (c) nitrate... Problem 42RQ Problem 43RQ Problem 44RQ: 2.44 Write the correct formulas for the compounds formed when the following react (a) calcium and... Problem 45RQ: 2.45 Write the unbalanced equations for the following reactions:
(a) Iron(III) hydroxide reacts with... Problem 46RQ: 2.46 Write the unbalanced equations for the following reactions:
(a) Propane reacts with oxygen to... Problem 47RQ: 2.47 With what kind of elements do nonmetals react?
Problem 48RQ: Which are the only elements that exist as free, individual atoms when not chemically combined with... Problem 49RQ Problem 50RQ: 2.50 Which kind of elements normally combine to form molecular compounds?
Problem 51RQ Problem 52RQ Problem 53RQ: 2.53 Without referring to Table 2.6 but using the periodic table, write chemical formulas for the... Problem 54RQ Problem 55RQ: 2.55 Astatine, a member of the halogen family, forms a pound with hydrogen. Predict its chemical... Problem 56RQ Problem 57RQ: Write the chemical formulas for (a) methane, (b) ethane, (c) propane, and (d) butane. Give one... Problem 58RQ Problem 59RQ Problem 60RQ Problem 61RQ Problem 63RQ: What is the difference between a binary compound and one that is diatomic? Give examples that... Problem 64RQ Problem 65RQ Problem 66RQ Problem 67RQ: 2.67 The compound is used in the tanning of leather. How many atoms of each element are given in... Problem 68RQ: Asbestos, a known cancer-causing agent, has a typical formula of Ca3Mg5(Si4O11)2(OH)2. How many... Problem 69RQ: 2.69 Epsom salts is a hydrate of magnesium sulfate, . What is the formula of the substance that... Problem 70RQ Problem 71RQ Problem 72RQ Problem 73RQ: Write the chemical formula for the molecule illustrated below. Problem 74RQ: Write the chemical formula for the molecule illustrated below. Problem 75RQ Problem 76RQ Problem 77RQ: 2.77 How many atoms of each element are represented in each of the following formulas? For each,... Problem 78RQ: 2.78 How many atoms of each kind are represented in the following formulas? For each, name the... Problem 79RQ: 2.79 How many atoms of each kind are represented in the following formulas? For each, name the... Problem 80RQ: 2.80 How many atoms of each kind are represented in the following formulas? For each, name the... Problem 81RQ Problem 82RQ: How many atoms of each element are represented in each of the following expressions? (a) 3N2O, (b)... Problem 83RQ: 2.83 Consider the balanced equation
(a) How many atoms of Na are on each side of the equation? (b)... Problem 84RQ: 2.84 Consider the balanced equation for the combustion of hexane, a component of gasoline:
(a) How... Problem 85RQ Problem 86RQ Problem 87RQ: Is the following chemical equation for the combustion of octane (C8H18), a component of gasoline,... Problem 88RQ: 2.88 Is the following chemical equation balanced? This reaction is used for the production of nitric... Problem 89RQ: 2.89 Use the periodic table, but not Table 2.2, to write the symbols for the ions of (a) K, (b) Br,... Problem 90RQ: 2.90 Use the periodic table, but not Table 2.2, to write the symbols for ions of (a) barium, (b)... Problem 91RQ Problem 92RQ Problem 93RQ Problem 94RQ Problem 95RQ Problem 96RQ Problem 97RQ Problem 98RQ Problem 99RQ Problem 100RQ Problem 101RQ Problem 102RQ: Name the following molecular compounds: (a)ClF3,(b)S2Cl2,(c)N2O5,(d)AsCl5. Problem 103RQ Problem 104RQ Problem 105RQ Problem 106RQ Problem 107RQ Problem 108RQ: Identify each of the following as molecular or ionic, and give its name:... Problem 109RQ Problem 110RQ Problem 111RQ Problem 112RQ Problem 113RQ: 2.113 Which of the following formulas are incorrect? Write the correct formula if possible.
(a)
(b)... Problem 114RQ: Which of the following formulas are incorrect? Write the correct formula if possible. (a) CrO4Ca (b)... Problem 115RQ Problem 116RQ Problem 117RQ: The compounds Se2S6andSe2S4 have been shown to be antidandruff agents. What are their names? Problem 118RQ Problem 119RQ: The following are models of molecules of two compounds composed of carbon, hydrogen, and oxygen. The... Problem 120RQ: A student obtained a sample from an experiment that had the following composition. If the experiment... Problem 121RQ: 2.121 Suppose you wanted, to separate the sample illustrated in the preceding question into its... Problem 122RQ: 2.122 The elements in Group 1A and Group 7A of the periodic table are some of the most reactive... Problem 123RQ Problem 124RQ Problem 125RQ: 2.125 Write the balanced chemical equation for the reaction between elements with atomic numbers of... Problem 126RQ: 2.126 Write the balanced gas phase chemical equation for the reaction of dinitrogen pentoxide with... Problem 127RQ: Bromine is a diatomic molecule, and it has two isotopes, 79Brand81Br, with a natural abundance of... Problem 128RQ Problem 129RQ Problem 130RQ Problem 131RQ Problem 132RQ: Explore the internet and find a reliable source of physical properties of elements and compounds.... Problem 133RQ: Spreadsheet applications such as Microsoft Excel can display data in a variety of ways, some of... format_list_bulleted