(a)
Interpretation:
Whether the compound zinc bromide is held together by ionic or covalent bond is to be stated.
Concept introduction:
The bond which occurs due to the electrostatic attraction in the oppositely charged ions is known as an ionic bond. The compounds that are formed by ionic bonds are known as ionic compounds. The atom which loses the electron is known as cation and the atom which gains the electron is known as anion.
(b)
Interpretation:
Whether the compound ammonia is held together by ionic or covalent bond is to be stated.
Concept introduction:
The covalent bond is formed when there is a difference in the electronegativity’s between the atoms. In the molecule of water, the electronegativity of oxygen is more than hydrogen. So, the valence electrons in hydrogen are attracted towards the oxygen atom because of which a partial positive charge on hydrogen atom occurs and a covalent bond is formed.
(c)
Interpretation:
Whether the compound iodine hepta-fluoride is held together by ionic or covalent bond is to be stated.
Concept introduction:
The covalent bond is formed when there is a difference in the electronegativity’s between the atoms. In the molecule of water, the electronegativity of oxygen is more than hydrogen. So, the valence electrons in hydrogen are attracted towards the oxygen atom because of which a partial positive charge on hydrogen atom occurs and a covalent bond is formed.
(d)
Interpretation:
Whether the compound lead
Concept introduction:
The bond which occurs due to the electrostatic attraction in the oppositely charged ions is known as an ionic bond. The compounds that are formed by ionic bonds are known as ionic compounds. The atom which loses the electron is known as cation and the atom which gains the electron is known as anion.
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Introductory Chemistry: Concepts and Critical Thinking (8th Edition)
- Two substances with empirical formula HNO are hyponi-trous acid ( μ=62.04 g /mol) and nitroxyl (μ=31.02 g/mol).(a) What is the molecular formula of each species?(b) For each species, draw the Lewis structure having the lowestformal charges. (Hint:Hyponitrous acid has an N=N bond.)(c) Predict the shape around the N atoms of each species.(d) When hyponitrous acid loses two protons, it forms the hy-ponitrite ion. Draw cisand transforms of this ion.arrow_forwardWhich statement about the properties of barium chloric and mercury(II) chloride is correct? (A) BaCl₂ has a higher melting point than HgCl₂. (B) BaCl₂ has a higher solubility in nonpolar solvents than HgCl₂. (C) BaCl₂ has a higher vapor pressure than HgCl₂. (D) Molten BaCl₂ has a lower electrical conductivity than molten HgCl2.arrow_forwardHow many bonding electrons are in the Lewis structure of O2?(a) 2 (b) 4 (c) 6arrow_forward
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- Draw a Lewis structure for(a) The cyclic silicate ion Si₄O₁₂⁸⁻(b) A cyclic hydrocarbon with formula C₄H₈arrow_forwardUse principles of atomic structure to answer each of the following: (1] (a) The radius of the Ca atom is 197 pm; the radius of the Ca2* ion is 99 pm. Account for the difference. (b) The lattice energy of CaO(s) is –3460 kJ/mol; the lattice energy of K20 is –2240 kJ/mol. Account for the difference. (c) Given these ionization values, explain the difference between Ca and K with regard to their first and second ionization energies. Element First lonization Energy (kJ/mol) Second lonization Energy (kJ/mol) K 419 3050 Ca 590 1140 (d) The first ionization energy of Mg is 738 kJ/mol and that of Al is 578 kJ/mol. Account for this difference.arrow_forwardWrite a Lewis structure for each of the following molecules and ions:(a) (CH3)3SiH(b) SiO44−(c) Si2H6(d) Si(OH)4(e) SiF62−arrow_forward
- Answer the following questions that relate to the chemistry of nitrogen. (a) Two nitrogen atoms combine to form a nitrogen molecule, as represented by the following equation. 2 N(g) ® N2(g) Using the table of average bond energies below, determine the enthalpy change, AH, for the reaction. Average Bond Energy (k) mol-1) Bond N-N 160 N=N 420 N°N 950 (b) The reaction between nitrogen and hydrogen to form ammonia is represented below. N2(g) + 3 H2(g)® 2 NH3(g) AH° = -92.2 kJ Predict the sign of the standard entropy change, AS', for the reaction. Justify your answer. (C) The value of AG° for the reaction represented in part (b) is negative at low temperatures but positive at high temperatures. Explain.arrow_forwardWhich statements are true about electronegativity? (a) Electronegativity increases from left to right in a period of the Periodic Table. (b) Electronegativity increases from top to bottom in a column of the Periodic Table . (c) Hydrogen, the element with the lowest atomic number, has the smallest electronegativity. (d) The higher the atomic number of an element, the greater its electronegativity.arrow_forward(A) CsBr (B) MgCl2arrow_forward
- Chemistry: The Molecular ScienceChemistryISBN:9781285199047Author:John W. Moore, Conrad L. StanitskiPublisher:Cengage Learning