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Concept explainers
(a
Interpretation:
The formula of each hydride needs to be determined and they need to be classified as ionic, covalent, or interstitial.
Concept introduction:
A balanced equation is the equation for a
(b
Interpretation:
The hydrides which are likely to be solids and gases at 250 C needs to be determined.
Concept introduction:
A balanced equation is the equation for a chemical reaction in which the number of atoms for every element in the reaction and the total charge are the same for both the reactants and the products.
(c
Interpretation:
The hydride which reacts with water at 250 C to give a basic solution needs to be determined.
Concept introduction:
A balanced equation is the equation for a chemical reaction in which the number of atoms for every element in the reaction and the total charge are the same for both the reactants and the products.
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Chapter 22 Solutions
CHEMISTRY-W/MASTERING CHEMISTRY ACCESS
- Complete and balance the following equations:(a) A salt like (alkaline earth metal) hydride reacting with water,CaH₂(s)+H₂O(l)→ (b) Reduction of a metal halide by hydrogen to form a metal,PdCl₂(aq)+H₂(g)→arrow_forwardTable gives the ionic radii for K^+ and O^2- as 0.138 and 0.140nm, respectively.(a) What is the coordination number for each O^2- ion?(b) Brief y describe the resulting crystal structure for K2O.(c) Explain why this is called the antif uorite structurearrow_forwardElement E forms an oxide of general structure A and a chloride of general structure B, shown at right.For the anion EF5-, what is (a) themolecular shape; (b) the hybridization of E; (c) the O.N. of E?arrow_forward
- (b) Write chemical equations for the following processes:(iv) Reduction of VO2+ to produce VO2+(v) Neutralization of sulfuric acid by barium hydroxide(vi) Thermal decomposition of 1 mol of sodium bicarbonate to produce sodium carbonate,carbon dioxide and waterarrow_forwardDefine the term empiricalchemical formula What is the shape of the SiO4 unit in complicated silicate anions?arrow_forwardWhich of the following statements are true?(a) Both nitrogen and phosphorus can form a pentafluoridecompound.(b) Although CO is a well-known compound, SiO does notexist under ordinary conditions.(c) Cl2 is easier to oxidize than I2.(d) At room temperature, the stable form of oxygen is O2,whereas that of sulfur is S8.arrow_forward
- Q.5(a) The alkali metals follow the noble gases in their atomic structure. What properties of these metals can be predicted from this information? (b) Arrange the carbonates of alkaline earth metals in order of thermal stability. (c) Explain the process involved in the manufacture of NaOH, Na2CO3 and NaHCO3. (d) Identify the element X in each of the following: (i) The oxide of XO2 has a high M.P., and is very abundant in nature. (ii) X forms three oxides: XO, XO2, X3O2. (iii) X forms compounds mainly in the +2 O.S., though some compounds in +4 state do exist. (iv) X occurs as several allotropes, including a molecular one. (e) Borazine reacts with three mole equivalents of HCl to give a material with chemical composition B3N3H9C13. (i) What is the structure of product? (ii) How does the isoelectronic benzene react with HCl? (f) Explain why bond length in NO (115 pm) is longer than that in nitrosonium ion (106 pm)?arrow_forward(1) Diamond and graphite are two minerals with identical chemical compositions, pure carbon (C). Diamond is the hardest of all minerals, and graphite is one of the softest. If their compositions are identical, why do they have such profound differences in physical properties? (2) silicon and oxygen together make up nearly 75 percent by weight of the Earth's crust. But silicate minerals make up more than 95 percent of the crust. Explain the apparent discrepancy. (3) If you were given a crystal of diamond and another of quartz, how would you tell which is diamond? (4) Would you expect minerais found on the Moon, Mars, or Venus to be different from those of the Earth's crust? Explain your answer. (5) Quartz is Si02. Why does no mineral exist with the composition Si03?arrow_forwardWrite balanced equations for the thermal decomposition of potassium nitrate (O₂ is also formed in both cases): (a) at lowtemperature to the nitrite; (b) at high temperature to the metaloxide and nitrogen.arrow_forward
- Silicon carbide, SiC, has the three-dimensional structure shown in the figure. (a) Name another compound that has the same structure.(b) Would you expect the bonding in SiC to be predominantlyionic, metallic, or covalent? (c) How do the bondingand structure of SiC lead to its high thermal stability(to 2700 °C) and exceptional hardness?arrow_forwardCrystal structure of Alo.5Gao.5AS Based on the zincblende crystal structure for GaAs, sketch the structure of Alo.sGao.5As. The lattice constant for Alo.sGao.5As is a = 5.653 Å. (a) Calculate the atomic density per unit volume for Alo.5Gao.5As. (b) What is the atomic density per unit area on the (100) and (110) planes? (c) The atomic radii for Al, Ga, and As are, respectively, 1.25 Å, 1.30 Å, and 1.15 Å. Using the hard-sphere model, estimate the lattice constant for Alo.5GA0.5As and compare the result with the value given above.arrow_forwardDiiodine pentaoxide (I₂O₅) was discovered by JosephGay-Lussac in 1813, but its structure was unknown until 1970!Like Cl₂O₇, it can be prepared by the dehydration-condensationof the corresponding oxoacid.(a) Name the precursor oxoacid, write a reaction for formation ofthe oxide, and draw a likely Lewis structure.(b) Data show that the bonds to the terminal O are shorter than the bonds to the bridging O. Why?(c) I₂O₅ is one of the few chemicals that can oxidize CO rapidly and completely; elemental iodine forms in the process. Write abalanced equation for this reaction.arrow_forward
- Chemistry: Principles and ReactionsChemistryISBN:9781305079373Author:William L. Masterton, Cecile N. HurleyPublisher:Cengage LearningChemistry: The Molecular ScienceChemistryISBN:9781285199047Author:John W. Moore, Conrad L. StanitskiPublisher:Cengage Learning
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