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If the vapor pressure of an aqueous solution of ethylene glycol C2H6O2 (62.06844 g/mol) was found to be 52.3 torr at 39.8 degrees C, calculate the grams of ethylene glycol used to make this solution if 215.00 mL H2O was used as solvent? Note: pure H2O has vapor pressure of 54.74 torr and density of 0.992 g/mL.
Then Calculate the freezing point of the ethylene glycol solution described above if the freezing point constant for the solvent is Kf=1.86 deg C kg/mol.
The precipitate was collected by filtration, washed and then ignited [turning the CaC2O4.H2O into CaO (FW=56.079 g/mol)] in a crucible that had an initial mass of 26.4092 g.
Van der Waals constants can be found here. P= ? atm Use the ideal gas equation to calculate the pressure under the same conditions. P= ? atm
determine the enthalpy change if the heat released when 24.9 grams of potassium k reacts with excess h2o water is 124
Chemical Kinetics - Show that only the reactants of the slow step of a reaction are found in the rate law of the reaction - which of the two steps is slower and which substance (if any) is probably an unstable intermediate?
The electrons in the neutral carbon atom are redistributed so that there are three lone electrons in the three 2p orbitals and one lone electron in the 2s orbital.
A student reacts 0.3000 grams of a sulfate-containing unknown with excess barium chloride. If 0.6500 grams of barium sulfate is produced, what is the percentage sulfate in the unknown?
There is substance that needs to be heated. the substance is gas. If were given T and P of the inlet and outlet, and given two equaitons one a z equation, for example:
Draw the base pairing between 8-oxoguanine and cytosine and 8-oxoguanine and adenine. Use single bonds to represent hydrogen bonds.
A solution is prepared by adding 20g of magnesium hydroxide solid to 2L of water that contains 10-5 MoI/L of Ca(OH)2. Determine the concentration of magnesium in the solution. Is there any solid magnesium hydroxide? How many grams
The radius of a uranium atom is 149 pm. How many uranium atoms would have to be laid side by side to span a distance of 4.55 mm?
calculate the total volume of hydrogen gas which would be collected at 760 mm Hg and 25 degrees celsius. Will a second gas be present in the sample collected by water displacement
Calculate the number of moles of HCl in the solution dispensed and its associated error.
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