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Sodium thisulfate, Na2S2O3, is used as a fixer when developing photographic film. What is the mass in grams of Na2S2O3 needed to make 100ml of a 0.25 solution?
Which molecule below exhibits dipole-dipole interactions but not dispersion forces. a)HF b)HCl c)CO2 d)CH3OH e)none of these
If what make an acid strong is the extent of dissociation, at what sorts of concentrations (high or low) do weak acids behave more like strong acids
Compounds are always composed of two or more elements. Atoms of different elements are different. Isotopes have the same number of protons but a different number of neutrons.
If a solution containing 63.411 g of mercury(II) chlorate is allowed to react completely with a solution containing 16.642 g of sodium sulfate, how many grams of solid precipitate will be formed. How many grams of the reactant in excess will remai..
A stock solution is prepared by adding 21 mL of 1 M AlCl3 to enough water to make 76 mL. What is the Cl- concentration of 40 mL of the stock solution?
Nitrogen monofluoride, NF, can serve as a ligand in transition-metal complexes. a. Prepare a molecule orbital energy-level diagram of the NF molecule, showing clearly how the atomic orbitals interact.
What is the solubility of Pb3(PO4)2 in a 0.025 M Na3PO4 solution? The solubility product for Pb3(PO4)2 is 1.0 x 10^-54.
What must be the atomic mass of the metal M If A sample of the compound MSO 4 weighing 0.1131 g reacts with barium chloride and yields 0.2193 g BaSO4.?
At room temperature (20), milk turns sour in about 65 hours. In a refrigerator at 3, milk can be stored three times as long before it sours. What is the activation energy of the reaction that causes the souring of milk?
A nucleus of mass number 27 contains 14 neutrons. An atomic ion of this element has 10 electrons in it. Write the symbol for this atomic ion
This compound sloly isomerizes completely to compund B, which has the same formula, Sketch the structures of A and B, and explain why B might be more stable than A
Given the parent compound, draw the mass spectrum fragment that is observed at m/z 77. Include any hydrogen atoms and the charge.
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