31. What is the answer to the following problem to the correct number of significant figures? 0.025 x 3.60 x 52.13 A) 4.7 B) C) 4.70 D) 4.6 E) 4.69 4.692 32. Which of the following correctly describes the Lewis structure of the carbonate ion? A) 2 single bonds, 1 double bond, 8 lone pairs B) 3 single bonds, 9 lone pairs C) 1 single bond, 2 double bonds, 9 lone pairs D) 3 double bonds, 6 lone pairs 33. What is the hydroxide concentration of a 3.33 x 10³ M hydrochloric acid solution? a. 3.00 x 10-¹2 M b. 1.52 x 10-¹2 M c. 7.00 x 10-7 M d. 1.00 x 10-7 M e. None of the above

31. What is the answer to the following problem to the correct number of significant figures? 0.025 x 3.60 x 52.13 A) 4.7 B) C) 4.70 D) 4.6 E) 4.69 4.692 32. Which of the following correctly describes the Lewis structure of the carbonate ion? A) 2 single bonds, 1 double bond, 8 lone pairs B) 3 single bonds, 9 lone pairs C) 1 single bond, 2 double bonds, 9 lone pairs D) 3 double bonds, 6 lone pairs 33. What is the hydroxide concentration of a 3.33 x 10³ M hydrochloric acid solution? a. 3.00 x 10-¹2 M b. 1.52 x 10-¹2 M c. 7.00 x 10-7 M d. 1.00 x 10-7 M e. None of the above

Chemistry

9th Edition

ISBN:9781133611097

Author:Steven S. Zumdahl

Publisher:Steven S. Zumdahl

Chapter8: Bonding: General Concepts

Section: Chapter Questions

Problem 110E: Predict die molecular structure and bond angles for each molecule or ion in Exercises 88 and 94. a....

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Predict die molecular structure and bond angles for each molecule or ion in Exercises 88 and 94. a. POCl3, SO42, XeO4, PO43, ClO4 b. NF3, SO32, PO33, ClO3 c.ClO2, SCl2, PCl2 d. Considering your answers to parts a, b, and c. what conclusions can you draw concerning the structures of species containing the same number of atoms and the same number of valence electrons? (O3), sulfur dioxide, and sulfur trioxide.
Which of the species with octets in Question 31 are dipoles?
Consider the Lewis structure for the polyatomic oxyanionshown here, where X is an element from the third period(Na - Ar). By changing the overall charge, n, from 1- to2- to 3- we get three different polyatomic ions. For each ofthese ions (a) identify the central atom, X; (b) determine theformal charge of the central atom, X; (c) draw a Lewis structurethat makes the formal charge on the central atom equalto zero.
(a) True or false: The hydrogen atom is most stable when ithas a full octet of electrons. (b) How many electrons must asulfur atom gain to achieve an octet in its valence shell? (c) Ifan atom has the electron configuration 1s22s22p3, how manyelectrons must it gain to achieve an octet?
Sulfur tetrafluoride (SF4) reacts slowly with O2 to form sulfurtetrafluoride monoxide (OSF4) according to the followingunbalanced reaction: SF4(g) + O2(g)---->OSF4(g)The O atom and the four F atoms in OSF4 are bonded to acentral S atom. (a) Balance the equation. (b) Write a Lewisstructure of OSF4 in which the formal charges of all atomsare zero. (c) Use average bond enthalpies (Table 8.3) to estimatethe enthalpy of the reaction. Is it endothermic or exothermic?(d) Determine the electron-domain geometry ofOSF4, and write two possible molecular geometries for themolecule based on this electron-domain geometry. (e) Foreach of the molecules you drew in part (d), state how manyfluorines are equatorial and how many are axial.
Draw Lewis diagrams for the following compounds. In theformula the symbol of the central atom is given first.(Hint: The valence octet may be expanded for the centralatom.)(a) PF5 (b) SF4 (c) XeO2F2
Which of the following is the correct setup and answer for the formal charge of sulfur in SH2?
2. Which of the following elements can form hyper coordinate compounds? Be, N, Br, F, none of the above can form compounds-with an expanded octet
The action of dinitrogen on calcium carbide at 1100°C leads to the formation of calcium cyanamideCaNCN following the equation: CaC2 + N2 → CaNCN + C a. What is the charge of the cyanamide ion? b. Write the Lewis structure for the cyanamide ion. All atoms should satisfy the octet rule.Include formal charges if any are present c. By hydrolysis, calcium cyanamide can be transformed into cyanamide with the formulaH2NCN. Write a Lewis structure for cyanamide, knowing that the hydrogen atoms arelocated on the peripheral atoms.
Consider the image of the P4 molecule provided and answer the following: 1. Are there any lone pairs of electrons present in the P4 molecule. It is advisable to draw the Lewis structure. 2. How many P-P bonds are present in the molecules. 3. Draw a Lewis structure for a linear P4 molecule, that would satisfy the octet rule. 4. Determine whether this linear structure has any resonance structures. If so, show all possibilities. 5. By calculating formal charges, explain which of the two structures, the linear molecule or the tetrahedral molecule would be more stable.
The percent ionic character of a bond between elements A and B may be approximated by the expression %IN = 100[1 - e^(-1/4(XA - XB))], where XA and XB are the electronegavities for the respective elements. What is the the percent ionic character of the interatomic bonds for Fe2O3? What type of bonding would you expect in Fe2O3? Note: Use 1.8 for the electronegativity for Fe and 3.5 for the electronegativity for O.
Which of the following is the correct setup and answer for the formal charge of nitrogen in NH3?