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Barium ions carry a 2+2+ charge, and nitrogen ions carry a 3−3− charge.
What is the chemical formula for the ionic compound barium nitride?
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- 2. A sodium chloride molecule has an Na-Cl distance of 236.1 pm (recall 1 pm is 10-12 m.) In this ionic molecule, the effective charges of the ions are +1.3x10-19 C for the Na and -1.3x10-19 C for the Cl (the charge is a little less than the charge of an electron because the chlorine doesn't remove the electron from the sodium completely, sharing it just a little bit.) 2 A* a. b. C. d. e. 1mm Na Cl 1mm Find the dipole moment of the NaCl molecule. What is the magnitudes and directions of the electric force on a proton placed at each of the locations of the test points, A and B? *B What is the magnitude and direction of the electric force on the molecule and due to a proton placed at test point A? How large (magnitude) is the potential difference between two points in line with the molecule, as shown below, where point A is 1 mm from the Na and point B is 1 mm from the Cl? Is the potential higher at A or B? Provido physicaA sample of a certain metal has a volume of 4 × 10−5 m3. The metal has a density of 9.0 g/cm3and a molar mass of 60 g/mol. The atoms are bivalent. How many conduction electrons (or valence electrons) are in the sample?The surface of an ideal molecule of table salt (NaCl) is a square with a chemical structure as shown in the figure. The blue spheres represent Na+ ions and the green spheres represent Cl− ions. Consider only points A, B, C, and D. What is the magnitude of the net electrostatic force on the chlorine ion at point A due to the sodium ions at points B and C? Note: the bond length is 0.282 nm. (N)
- In solid KCI the smallest distance between the centers of a. potassium ion and a chloride ion is 314 pm. Calculate the length of the edge of the unit cell and the density of KCI, assuming it has the same structure as sodium chloride.A monatomic ion has a charge of +2. The nucleus of the ion has a mass number of 86. The number of neutrons in the nucleus is 1.26 times that of the number of protons. How many electrons and what is the element?The repulsive force between Na+ and Cl- ions can be written as F = Be-T/R where B = 5.45 x 10-6 N and R = 0.321 Å. At equilibrium, this force is equal to the magnitude of the attractive force given by F Determine the value of r at equilibrium. e² 4π€or²
- A compound containing An+ cations and XO4- anions crystallizes in a cubic lattice. The Ant cations are situated on the unit cell corners; the XO4 lons are centered on the face centers and at the body center. What is the charge on the cation, A**? A. A, +1 C. +2 B. +3 D. +4P-type semi conducting material is Select one: a. holes are majority charge carriers and it is due to addition of trivalent impurities. O b. electrons are majority charge carriers and it is due to addition of trivalent impurities. O c. holes are minority charge carriers and it is due to addition of pentavalent impurities. Od. electrons are majority charge carriers and it is due to addition of pentavalent impurities.A crystal of salt consists of electrons and positive ions. How does the net charge of the electrons compare with the net charge of the ions? Explain.
- The measured density of a NaF crystal is 2.558 g/cm3 . What is the equilibrium separate distance of Na+ and Flions?The molecule bromine monofluoride has a dipole moment of 1.42 D and a bond length of 176 pm. Calculate the charge on the ends of the molecule. Express your answer as a positive real number in electronic charge units (e = 1.60 × 10-19 C).Table 1.2 Structures and Cell Dimensions of Some Elements and Compounds Element or compound 7803838 2 2 2 2 2 5 Al Be Pt Si Ag Na Structure Agl ZnS CdS fec hcp fcc Diamond bcc hcp fcc Diamond fec bcc fec Diamond fec bcc hep LiH NaCl AgBr MnO CsCl TIBr Cu Zn (B-brass) Cesium chloride CuF Sodium chloride Sodium chloride Sodium chloride Sodium chloride Cesium chloride Cesium chloride Zincblende Zincblende Zincblende Zincblende a, Å 4.04 2.27 5.56 3.56 2.88 2.51 3.61 5.65 4.07 2.86 3.92 5.43 4.08 4.28 2.66 4.08 5.63 5.77 4.43 4.11 3.97 2.94 4.26 6.47 5.41 5.82 c, Å 3.59 4.07 4.94
