Explain why the hydride ion, H -, has a noble gas configuration.
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Explain why the hydride ion, H -, has a noble gas configuration.
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- What mass of gallium oxide, Ga2O3, can be prepared from 29.0 g of gallium metal? The equation for the reaction is 4Ga + 3O2 ⟶ 2Ga2 O3.To form S²⁻ ions from gaseous sulfur atoms requires 214 kJ/mol, but these ions exist in solids such as K₂S. ExplainThe density of trifluoroacetic acid vapor was determined at 118.1 °C and 468.5 torr, and found to be 2.784 g/L. Calculate K, for the association of the acid. 0-H...O 2CF,CO,H(g) = CF;C CF,C(g) O----H-O
- Dimethyl ether has the same molecular formula as ethanol (Problem 4.57) but very different properties. Propose a structure for dimethyl ether in which the oxygen is bonded to two carbonsWhat is the IUPAC name of the following compound? (No need to provide E/Z designation.) CO₂HThe H⁺ concentration in an aqueous solution at 25 °C is 4.3 × 10⁻⁶. What is [OH⁻]?
- Compound A has molecular formula C7H7X. Its 1H-NMR spectrum shows a singlet at 2.25 ppm and two doublets, one at 7.28 ppm and one at 7.39 ppm. The singlet has an integral of three and the doublets each have an integral of two. The mass spectrum of A shows a peak at m/z = 126 and another peak at m/z = 128; the relative height of the two peaks is 3:1 respectively. Identify what atom X is, explaining your reasoning and identify Compound A, explaining your reasoning.Consider the following acids and their ionization constant, determine which conjugate base is HCOOH Ka = 1.7 x 10-4 (b) HCN Ka = 4.9 x 10-10If one compound has the formula C5H10 and another has the formula C4H10, are the two compounds isomers? Explain.
- Water 1H2O2 is more polar than hydrogen sulfide 1H2S2. Explain.When pentane is exposed to Br2 in the presence of light, a halogenation reaction occurs. Write the formulas of:(a) All possible products containing only one bromine(b) All possible products containing two bromines that are not on the same carbonFor an acid HA, the concentrations of HA and A are 0.075 and 0.025, respectively, at pH 6.0. What is the p K a value for HA?