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Explain what is the minimum mass of ethylene glycol that must be dissolved in 14.5 kg water to prevent the solution from freezing at -23.0 Celsius. Assume ideal behavior
a solid phosphorus pentabromide pbr5 is formed from solidphosphorus p4 and liquid bromine br2 according to the
For the oxidation-reduction reaction equation given here, 2Na + S --> Na2S, indicate how many electrons are transferred in the formation of one formula unit of product.
The energy levels of hydrogenlike one-electron ions of atomic number Z differ from those of hydrogen by a factor of Z^2. Predict the wavelength of the transition
a brand of household bleach is 5.0 sodium hypochlorite naocl by mass and has a density of 1.08 gml. in washing
A solution of hydrochloric acid has a concentration of 12.8 mol/L. However, a chemistry professor needs HCl(aq) with a concentration of 0.100 mol/L for an experiment with his students.
Calculate the equilibrium concentration of HC2O4- in a 0.20 M solution of oxalic acid.
For the synthesis of an insoluble salt (such as SrCl2 and Na2SO4, to get SrSO4) what are some reasons why percent yield may be greater than 100%? Lower than 100%?
What pH is needed such that the maximum [Mg^2+] is solution is 2x10^-4M given the equilibrium: Mg(OH)2(s) Mg^(2+) + 2OH^- also pK(sp)=8.3
Take N3 as the independent variable and solve for N2 in terms of N3. Then solve for N1 in terms of N2 and N3. b. Taking note that there cannot be a negative population, what are the possible values of N3 ?
If the primary alcohol ethanol is subjected to sulfuric acid, an SN2 substitution would occur instead and diethyl ether would be formed.
In acid-base equilibria, the strength of acids and bases are reflected by their Ka's and Kb's, respectively. Explain, using examples while Ksp cannot directly reflect the solubility of the ionic compound.
the activation energy for the decomposition of hydrogen peroxide is 43 kjmol whereas when the reaction is catalyzed by
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