What makes ionic crystals, such as calcium chloride, very hard and brittle? a)The atoms are covalently...
What makes ionic crystals, such as calcium chloride, very hard and brittle? a)The atoms are covalently bonded to the atom next to them.B) Ionic crystals are not hard and brittle. C)The molecules are held together by dipole-dipole forces. D)The strong ionic bonds between the ions in the crystal.
Homework Answers
Both option C and D because, Ionic crystals like calcium chloride are hard because of tight packing lattices, say, the positive and negative ions are strongly attached among themselves. Ionic compounds are brittle due to the presence of non directional bond between the ions.
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What makes ionic crystals, such as calcium chloride, very hard
and brittle? a)The atoms are covalently...
7. If an ionic bond is stronger than a dipole-dipole interaction, how can water dissolve an...
7. If an ionic bond is stronger than a dipole-dipole interaction, how can water dissolve an ionic compound? None of these The ion-dipole interactions of a bunch of water molecules gang up on the strong ionic bond and pull it into the solution. The ions never overcome their interatomic attraction and therefore are not soluble. The ionic bond is weakened by the ion-dipole interactions and ionic repulsion ejects the ions from the crystal. The ion-dipole...
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1. Select the two compounds that are more likely to be a gas at room temperature (as opposed to a liquid). CH4 CH3OH C2H6 H2O 2. The separation of charges within a polar molecule is called a(n) ________. polar bond strong attraction dipole ionic bond dipole-dipole 3. Which of the following intermolecular forces best describes why nonpolar molecules like gasoline (C8H18) have only limited solubility in water? dipole-dipole ion-dipole Both dipole-dipole and induced dipole-induced dipole induced dipole-induced dipole dipole-induced dipole...
Molecular compounds consist of: a. atoms of nonmetals bonded together by covalent bonds. b. ions held together...
Molecular compounds consist of: a. atoms of nonmetals bonded together by covalent bonds. b. ions held together by electrostatic forces. c. metal atoms in a crystalline network that share electrons among many atoms. d. both b and c
Q10. Highlight in the following colours the correct descriptions of: metallic bonds, covalent bonds and ionic...
Q10. Highlight in the following colours the correct descriptions of: metallic bonds, covalent bonds and ionic bonds A. Sharing of valence electrons B. Magnetic dipole forces C. Repulsion between ions being shielded by a valence electron cloud D. Exchange of an electron between two atoms E. Electrostatic attraction between a proton and the electron cloud of a F atom
19. Which of the following statements regarding ionic compounds is correct? A) Ions are held together...
19. Which of the following statements regarding ionic compounds is correct? A) Ions are held together in an ionic lattice by covalent bonds. B) The crystal structure of a given compound does not depend on the sizes and number of ions in a formula unit of the compound. C) Ionic compounds tend to have low melting points. D) Ionic compounds are formed when two metals react. E) In forming an ionic compound from its elements, one element transfers one or...
What are the most significant intermolecular forces of attraction between nonpolar atoms or molecules? a. disperson...
What are the most significant intermolecular forces of attraction between nonpolar atoms or molecules? a. disperson b. dipole-dipole c. covalent d. ionic
2. Identify the strongest type of intermolecular forces in acetone, ethanol, water and hexane. (Structures listed...
2. Identify the strongest type of intermolecular forces in acetone, ethanol, water and hexane. (Structures listed on page 15.) Experiment 2 Intermolecular Forces There are three general types of intermolecular forces. All substances exhibit London Dispersion Forces (LDF), and they are generally the weakest of the three types. These London forces are due to the attractions between small, temporary dipoles that arise from the constant, random movement of the electrons in a substance. As molar mass increases, the size of...
Q6. HOCH2CH2OH(s) is classified as a/an: A. metallic crystal. B. covalent solid. C. molecular crystal....
Q6. HOCH2CH2OH(s) is classified as a/an: A. metallic crystal. B. covalent solid. C. molecular crystal. D. amorphous solid. Q7. Magnesium oxide, MgO, melts at 2,800°C and is very hard. The liquid conducts electricity very well. What kind of crystal is this? A. Ionic Crystal B. Covalent Crystal C. Metallic Crystal D. Molecular Crystal Q8. Which one of the following substances will have both dispersion forces and dipole-dipole forces? A. HC B . Br2 D. H2 E. CO2 Q9. W(s) is classified as a/an A. metallic crystal. B. covalent...
Which of the following best describes London dispersion forces. Question 1 options: the intermolecular forces that...
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3. Assuming atoms can be represented as hard spheres, the bonding energy between a sodium ion and a chloride ion pair can be represented by: 1.436 7.32x10-6 8 1 1 where U is energy per ion pair in eV...
3. Assuming atoms can be represented as hard spheres, the bonding energy between a sodium ion and a chloride ion pair can be represented by: 1.436 7.32x10-6 8 1 1 where U is energy per ion pair in eV and r is the separation distance between ions in nanometers. Write answers in units of eV and nm. a) Find the equation for force between the atom pair. b) Find the equilibrium separation distance ro- c) Estimate the elastic modulus for...
19. Which of the following statements regarding ionic compounds is correct? A) Ions are held together in an ionic lattice by covalent bonds. B) The crystal structure of a given compound does not depend on the sizes and number of ions in a formula unit of the compound. C) Ionic compounds tend to have low melting points. D) Ionic compounds are formed when two metals react. E) In forming an ionic compound from its elements, one element transfers one or...
2. Identify the strongest type of intermolecular forces in acetone, ethanol, water and hexane. (Structures listed on page 15.) Experiment 2 Intermolecular Forces There are three general types of intermolecular forces. All substances exhibit London Dispersion Forces (LDF), and they are generally the weakest of the three types. These London forces are due to the attractions between small, temporary dipoles that arise from the constant, random movement of the electrons in a substance. As molar mass increases, the size of...
3. Assuming atoms can be represented as hard spheres, the bonding energy between a sodium ion and a chloride ion pair can be represented by: 1.436 7.32x10-6 8 1 1 where U is energy per ion pair in eV and r is the separation distance between ions in nanometers. Write answers in units of eV and nm. a) Find the equation for force between the atom pair. b) Find the equilibrium separation distance ro- c) Estimate the elastic modulus for...
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