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Calculate the weight of iron (II) sulfate heptahydrate which is crystallized from the 80 g solution of iron (II) sulfate saturated at 50 degrees C by cooling it down to 10 degrees C a solution, Solubility: s(50 degrees C)=22 g FeSO4/100 g of solutions(10 degrees C)=12.0 g FeSO4/100 g of solution
A powder contains FeSO4·7H2O (molar mass = 278.01 g/mol) among other components. A 3.585-g sample of the powder was dissolved in HNO3 and heated to convert all iron to Fe3
An ideal gas is compressed isothermally from 2.0 atm and 2.0 L to 4.0 atm and 1.0 L. Calculate the values of delta U and delta H is the process is carried out a) reversibly and b) irreversibly
a 100 g sample of water at 23C is added to a 45 g sample of water at 99C. what is the final temperature of the sample
A 25.0-mL aliquot of vinegar was diluted to 250 mL on a volumetric flask. Titration of 50.0-mL aliquots of the diluted solution required an average of 34.88 mL of 0.09600 M NaOH. Express the acidity of the vinegar in terms of the percentage (w/v) ..
a. the carbon dioxide of the atmosphere being a nonmetallicoxide and acid anhydride has a low solubility in rainwater
Why is the catalyst Copper Chloride faster at the decomposition of hydrogen peroxide than Postassium Iodide and Lead Oxide
A solution is prepared by dissolving 3.00 g of an unknown nonelectrolyte in 20.00 g of cylcohexane (tf = 6.6 oC and kf = 20.0 oC/m). What is the molar mass of the unknown compound if the solution has a freezing point of -6.4 oC
Predict the wavelength (in nm) of the lowest energy electronic transition in the dye polymethine ion. Assume all C-C and C-N bond lengths are the same and are 1.4 A (0.14 nm) and that N+1 contributes 1 π-electron and N contributes 2 π-electrons
Why are the crude ester mixtures washed with aqueous NaHCO3?2. You wish to test 9 esters for antitumor activity. One and only one of the 9 esters will actually have antitumor activity. You will prepare the esters from an alcohol and an acid as was..
if electricity of sufficient voltage is passed into a solution of potassium iodide in water a reaction takes place in
cubic centimeter of rubber is worn off an automobile tire with each revolution of the wheel?
consider an ideal gas being heated reversibly from t1 to t2 at a constant volume and then allowed to expand
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