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In a 0.1 molar solution of NaCl in water, which one of the following will be closest to 0.1?" A) the mole fraction of NaCl B) The mass fraction of NaCl C) The mass percent of NaCl D) The molality of NaCl E) All of these are about 0.1
Consider all the valence electron pairs of the central atom-both those that are shared in covalent bonds, called bonding pairs, and those that are unshared, called non-bonding pairs or unshared pairs.
Octane (C8H18) undergoes combustion according to the following thermochemical equation: 2C8H18(l) + 25O2(g) ? 16CO2(g) + 18H2O(l) ?H°rxn = -11,020 kJ/mol. Given that ?H°f[CO2(g)] = -393.5 kJ/mol
Given the equation 3CO(g) + Fe2O3(s) = 2Fe(s) + 3CO2(g) +24.7 kJ, how much heat is released when 56.0 g of CO react?
draw the shape of the molecules and give the orbital geometry around the central atom; the molecular geometry; and give the hybridization state
Questions on H-NMR spectrum of isopentyl acetate - What would the effect on yield be of allowing the crushed Dry Ice to be exposed to the atmosphere for long periods of time before being used?
Calculate the concentrations of each of the ions in 0.12 M (NH4)2HPO4. a) [NH4+], M b) [HPO42-], M
The densities of ice and water at 0 C are 0.9168 and 0.9998 respectively. if delta h for the fusion process at atmospheric pressure is 0.625 what is delta u.
Calculate the voltage of the cell 2Ag+(aq) (0.200 M) + Cu(s) Cu2+(aq) (0.080 M) + 2Ag(s) Eocell = 0.460 V
The heat of neutralization of HCl by NaOH is H°rxn = -56.2 kJ/mol. How much heat is released when 125 mL of 1.750 M HCl is mixed with 195 mL of 0.667 M NaOH.
A compound containing only carbon, hydrogen, and oxygen is subjected to elemental analysis. Upon complete combustion, a 0.9294-g sample of the compound
Give Structures- Indentify unknown organic liquids, An unknown organic liquid, A, was found to burn with yellow, sooty flame and give a positive Lucas test (about 5 min). Upon treatment with sodium dichromate-sulfuric acid solution it produced Comp..
The solubility product of PbBr2 is 8.9 X 10^(-6). Determine the molar solubility in the pure water.
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