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Explain why hydrogen fluoride (HF) has a higher boiling temperature that Hydrogen chloride(HCl) even though Hf has a lower molecular weight.
ethanol c2h5oh melts at -114degc. the enthalpy of fusion is 5.02 kjmol. the specific heats of solid and liquid ethanol
Use average bond energies to estimate enthalpy changes for C(s) + CO2(g) -----> 2CO(g) i got -221 kj/mol, but it was the wrong answer though.
write net equations for the acid-base reactions that occur when the given aqueous solutions are mixed. Determine the value of the equilibrium constant. Use single arrows for the extensive reactions (K>1000) but double arrows otherwise.
What mass of potassium bromide residue remains if 500.0 mL of 0.200 M potassium bromide solution are evaporated to dryness?
The solubility of the ionic compound M2X3, having a molar mass of 214 g/mol, is 3.18 10-7 g/L. Calculate the Ksp of the compound.
From the following chemical equation determine how many grams of Ca(OH)2 you would need to react with 6.26 moles of HBr. How many grams of water will be made
Determine the empirical formula of a compound that is 52% carbon, 13 % hydrogen, and 35 % oxygen. What is the moleuclar formula is the molecular weight of the compound is 46.06 g/mol?
There are four peaks in the H nmr but they do not match the calculated ppm values. Which hydrogens would match the peaks for m-trifluoromethyl benzoic acid
The solubility of KNO3 is 38 g/100 g H2O at 20 degrees Celsius and 1.50 times 100 g/100 g H2O at 70 degrees Celsius. A solution is prepared by mixing 45 g of KNO3 in 35 g H2O at 70 degrees Celsius. Will all of the potassium nitrate dissolve at 70 ..
Suppose you pick up a 15-pound ball of iron (such as a "shot-put" ball at a track event). The iron ball has the same temperature as the atmosphere (26 °C). How many joules of heat energy must the iron ball absorb to reach the temperature of your b..
For a chemical system at equilibrium, the forward and reverse rates of reaction are equal. 3. For an aqueous chemical system at equilibrium, the concentrations of products divided by the concentrations of reactants equals one.
Aspirin is an organic acid with formula C8H7COOH and molar mass 180.16171 g/mol. A 1.30 g tablet is titrated with 0.1500 M HCl and the endpoint is reached
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