Chemistry: The Central Science (14th Edition)

14th Edition

ISBN: 9780134414232

Author: Theodore E. Brown, H. Eugene LeMay, Bruce E. Bursten, Catherine Murphy, Patrick Woodward, Matthew E. Stoltzfus

Publisher: PEARSON

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Atoms and Molecules

An atom is the smallest unit of an element that possesses all the properties of that particular element. Molecules are the smallest unit of a substance that possess all the properties of that particular substance.

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Chapter 7, Problem 113IE

When magnesium metal is burned in air (Figure 3.6 ), two products are produced. One is magnesium oxide, MgO. The other is the product of the reaction of Mg with molecular nitrogen, magnesium nitride. When water is added to magnesium nitride, it reacts to form magnesium oxide and ammonia gas. (a) Based on the charge of the nitride ion (Table 2.5 ), predict the formula of magnesium nitride. (b) Write a balanced equation for the reaction of magnesium nitride with water. What is the driving force for this reaction? (c) In an experiment, a piece of magnesium ribbon is burned in air in a crucible. The mass of the mixture of MgO and magnesium nitride after burning is 0.470 g. Water is added to the crucible, further reaction occurs, and the crucible is heated to dryness until the final product is 0.486 g of MgO. What was the mass percentage of magnesium nitride in the mixture obtained after the initial burning? (d) Magnesium nitride can also be formed by reaction of the metal with ammonia at high temperature. Write a balanced equation for this reaction. If a 6.3-g Mg ribbon reacts with 2.57 g NH₃(g) and the reaction goes to completion, which component is thelimiting reactant? What mass of H2 (g) is formed in the reaction? (e) The standard enthalpy of formation of solid magnesium nitride is -461.08 kJ/mol. Calculate the standard enthalpy change for the reaction between magnesium metal and ammonia gas.

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Chapter 7, Problem 112IE

Chapter 7, Problem 114IE

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Chapter 7 Solutions

Chemistry: The Central Science (14th Edition)

Ch. 7.3 - Hypothetical elements X and Y form a molecule XY2,...Ch. 7.3 - Prob. 7.1.2PE Ch. 7.3 - Prob. 7.2.1PE Ch. 7.3 - Arrange Be, C, K, and Ca in order of increasing...Ch. 7.3 - Arrange the following atoms and ions in order of...Ch. 7.3 - Prob. 7.3.2PE Ch. 7.3 - Prob. 7.4.1PE Ch. 7.3 - Prob. 7.4.2PE Ch. 7.4 - Prob. 7.5.1PE Ch. 7.4 - Prob. 7.5.2PE

Ch. 7.4 - Consider the following statements about first...Ch. 7.4 - Prob. 7.6.2PE Ch. 7.4 - Prob. 7.7.1PE Ch. 7.4 - Write the electron configurations for (a) Ga3+...Ch. 7.6 - Prob. 7.8.1PE Ch. 7.6 - Prob. 7.8.2PE Ch. 7.6 - Prob. 7.9.1PE Ch. 7.6 - Prob. 7.9.2PE Ch. 7.7 - Prob. 7.10.1PE Ch. 7.7 - Prob. 7.10.2PE Ch. 7 - Prob. 1DE Ch. 7 - Prob. 1E Ch. 7 - 7.2 Which of these spheres represents F, which...Ch. 7 - Prob. 3E Ch. 7 - Prob. 4E Ch. 7 - Prob. 5E Ch. 7 - Prob. 6E Ch. 7 - Prob. 7E Ch. 7 - Prob. 8E Ch. 7 - Prob. 9E Ch. 7 - Prob. 10E Ch. 7 - Prob. 11E Ch. 7 - 7.12 Moseley's experiments on X rays emitted from...Ch. 7 - Among elements 1-18, which element or elements...Ch. 7 - Prob. 14E Ch. 7 - Detailed calculations show that the value of Zeff...Ch. 7 - Detailed calculations show that the value of Zeff...Ch. 7 - Which will experience the greater effective...Ch. 7 - Arrange the following atoms in order of increasing...Ch. 7 - Prob. 19E Ch. 7 - Prob. 20E Ch. 7 - Tungsten has the highest melting point of any...Ch. 7 - Prob. 22E Ch. 7 - Estimate the As-I bond length from the data in...Ch. 7 - Prob. 24E Ch. 7 - Using only the periodic table, arrange each set of...Ch. 7 - Using only the periodic table, arrange each set of...Ch. 7 - Prob. 27E Ch. 7 - Prob. 28E Ch. 7 - Which neutral atom is isoelectronic with each of...Ch. 7 - Some ions do not have a corresponding neutral atom...Ch. 7 - Consider the isoelectronic ions F- and Na+. (a)...Ch. 7 - Prob. 32E Ch. 7 - Prob. 33E Ch. 7 - Arrange each of the following sets of atoms and...Ch. 7 - Prob. 35E Ch. 7 - In the ionic compoundsLiF,NaCI,KBr, andRbl, the...Ch. 7 - Prob. 37E Ch. 7 - 7.38 Write equations that show the process for...Ch. 7 - Prob. 39E Ch. 7 - Prob. 40E Ch. 7 - Prob. 41E Ch. 7 - (a) What is the trend in first ionization energies...Ch. 7 - Prob. 43E Ch. 7 - Prob. 44E Ch. 7 - Prob. 45E Ch. 7 - Prob. 46E Ch. 7 - Prob. 47E Ch. 7 - Prob. 48E Ch. 7 - Write an equation for the second electron affinity...Ch. 7 - If the electron affinity for an element is a...Ch. 7 - Prob. 51E Ch. 7 - 7.52 What is the relationship between the...Ch. 7 - Prob. 53E Ch. 7 - Consider the following equation: Ca + (g) + e-...Ch. 7 - 7.55(a) Does metallic character increase,...Ch. 7 - Prob. 56E Ch. 7 - Prob. 57E Ch. 7 - Prob. 58E Ch. 7 - Predict whether each of the following oxides is...Ch. 7 - Prob. 60E Ch. 7 - Would you expect manganese(II) oxide, MnO, react...Ch. 7 - Prob. 62E Ch. 7 - Prob. 63E Ch. 7 - An element X reacts with oxygen to form X02 and...Ch. 7 - Prob. 65E Ch. 7 - Prob. 66E Ch. 7 - Prob. 67E Ch. 7 - Prob. 68E Ch. 7 - Prob. 69E Ch. 7 - Write a balanced equation for the reaction that...Ch. 7 - (a) As described in Section 7.7 , the alkali...Ch. 7 - Prob. 72E Ch. 7 - Prob. 73E Ch. 7 - Prob. 74E Ch. 7 - Prob. 75E Ch. 7 - Prob. 76E Ch. 7 - Prob. 77E Ch. 7 - Prob. 78E Ch. 7 - Consider the stable elements through lead (Z =...Ch. 7 - 17.80]Figure 7.4 shows the radial probability...Ch. 7 - (a) If the core electrons were totally effective...Ch. 7 - Prob. 82AE Ch. 7 - Prob. 83AE Ch. 7 - Prob. 84AE Ch. 7 - Prob. 85AE Ch. 7 - The following observations are made about two...Ch. 7 - Prob. 87AE Ch. 7 - Prob. 88AE Ch. 7 - Prob. 89AE Ch. 7 - Prob. 90AE Ch. 7 - Explain the variation in the ionization energies...Ch. 7 - Prob. 92AE Ch. 7 - Prob. 93AE Ch. 7 - Prob. 94AE Ch. 7 - Prob. 95AE Ch. 7 - Prob. 96AE Ch. 7 - Prob. 97AE Ch. 7 - The electron affinities. in kJ/mol, for the group...Ch. 7 - 7.99 Hydrogen is an unusual element because it...Ch. 7 - Prob. 100AE Ch. 7 - Prob. 101AE Ch. 7 - Which of the following is the expected product of...Ch. 7 - Elemental cesium reacts more violently with water...Ch. 7 - Prob. 104AE Ch. 7 - Prob. 105AE Ch. 7 - Prob. 106AE Ch. 7 - Prob. 107AE Ch. 7 - Prob. 108AE Ch. 7 - Prob. 109IE Ch. 7 - Prob. 110IE Ch. 7 - Prob. 111IE Ch. 7 - Mercury in the environment can exist in oxidation...Ch. 7 - When magnesium metal is burned in air (Figure 3.6...Ch. 7 - Prob. 114IE Ch. 7 - Prob. 115IE

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