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- How many grams of gaseous ammonia will the reaction of 3.0 g hydrogen gas and 3.0 g of nitrogen gas produce?Predict the best choice in each of the following. You may wish to review the Chapter on electronic structure for relevant examples. (a) the most metallic 0f the elements Al, Be, and Ba. (b) the most covalent of the compounds NaCl, CaCl2, and BeCl2;. (c) the lowest first ionization energy among the elements Rb, K, and Li. (d) the smallest among Al, Al+, and Al3+. (e) the largest among Cs+, Bar2+, and XeKMnO4, H₂O (hot, concd.)
- A sample of an oxide of Sn, A weighing 3.014g was heated at a low temperature losing part of its oxygen to form another oxide B weighing 2.694g. Further heating of B removed the rest of the oxygen to give 2.374g of Sn. Seduce the formula of the oxides A and B [Sn = 118.7, O= 16]What mass of gallium oxide Ga2O3 can be prepared from 29.0 g of gallium metal?Iodine is an essential trace element in our diet; it is needed to produce thyroid hormone. Insufficient iodine in the diet can lead to the development of a goiter, an enlargement of the thyroid gland . The addition of small amounts of iodine to table salt (iodized salt) has essentially eliminated this health concern in the United States, but as much as 40% of the world’s population is still at risk of iodine deficiency. The iodine atoms are added as anions, and each has a 1− charge and a mass number of 127. Determine the numbers of protons, neutrons, and electrons in one of these iodine anions.
- A major challenge in implementing the “hydrogen economy”is finding a safe, lightweight, and compact way of storinghydrogen for use as a fuel. The hydrides of light metalsare attractive for hydrogen storage because they can store ahigh weight percentage of hydrogen in a small volume. Forexample, NaAlH4 can release 5.6% of its mass as H2 upondecomposing to NaH1s2, Al1s2, and H21g2. NaAlH4 possessesboth covalent bonds, which hold polyatomic anionstogether, and ionic bonds. (a) Write a balanced equationfor the decomposition of NaAlH4. (b) Which element inNaAlH4 is the most electronegative? Which one is the leastelectronegative? (c) Based on electronegativity differences,predict the identity of the polyatomic anion. Draw a Lewisstructure for this ion. (d) What is the formal charge on hydrogenin the polyatomic ion?At each altitude, the ionized atomic oxygen (O+) density sometimes approaches, but never exceeds the electron density (e-). Explain why O+ density does not exceed electron density.A major challenge in implementing the “hydrogen economy”is finding a safe, lightweight, and compact way of storinghydrogen for use as a fuel. The hydrides of light metalsare attractive for hydrogen storage because they can store ahigh weight percentage of hydrogen in a small volume. Forexample, NaAlH4 can release 5.6% of its mass as H2 upondecomposing to NaH(s), Al(s), and H2(g). NaAlH4 possessesboth covalent bonds, which hold polyatomic anionstogether, and ionic bonds. (a) Write a balanced equationfor the decomposition of NaAlH4. (b) Which element inNaAlH4 is the most electronegative? Which one is the leastelectronegative? (c) Based on electronegativity differences,predict the identity of the polyatomic anion. Draw a Lewisstructure for this ion. (d) What is the formal charge on hydrogenin the polyatomic ion?
- Write a balanced chemical equation based on the following description: the reaction of gaseous tricarbon octahydride with oxygen gas produces gaseous carbon dioxide and water vaporGroup the electronic configurations of neutral elements in sets according to those you would expect to show similar chemical properties. Note that as long as the configurations are grouped correctly with regard to each other, it does not matter which set you assign to each group. Set A Set B Answer Bank 1s2s? 1s°2s²2p°3s²3p°4s² Is²25²2p°3s°3p² 1s? 1s²25²2p 655²4d105p°6s²4f\45dl®6p² about us careers privacy policy terms of use contact us helpI have multiple questions Mixing SbCl3 and GaCl3 in a 1:1 molar ratio (using liquid sulfur dioxide as solvent) gives a solid ionic compound of empirical formu la GaSbCls. A controversy arises over whether this compou nd is (SbCl2•)(GaC l4 ) or (GaCl2•)(SbC l4"). Predict the molecular structure of the two It is learned that the cation in the compounds has a bent Basic on this fact, which formulation is more likely to be correct?==================================== Mult iply charged ions have received growing attention by the scientific community due to their interesting physical properties and their observation in many fields such as plasma chemistry, surface science, but also in interstellar chemistry, where we can find some molecules not readily observe otherwise. In this problem we will use Molecular Orbital theory to predict the stability of molecules. Consider the diatom ic Ne2 and its cation derivative, Ne2 +,…
