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Coal has 5 % impurities of lime, 6 % impurities of sand, and 7 % impurities of pyrite. Calculate volume of gases at 200 degree C and pressure 750 mmHg, formed after burning 1 kg of this coal. Products of pyrite combustion are ferric oxide and sulfur dioxide.
Examine the nuclide neptunium-237. The nuclide has a measured nuclear mass of 237.048166 amu. Determine the binding enery in kj, kj/mole
Explain what mass of precipitate will form if 1.50 L of concentrated Pb(ClO3)2 is mixed with 0.750 L of 0.200 M NaI. Presume the reaction goes to completion.
Consider the peaks for pentafluorobenzene (12.98min) and benzene(13.20min) in the chromatogram shown above. The elution timefor the unretained solute is 1.06 minutes. The open tubularcolumn is 30.0m in length and 0.530mm in diameter, with a layer ..
What is the rate of reaction of O2? What is the rate of formation of N2O5?
A 64gram piece of ice at 0 celsius is added to a sample of water at 9 celsius. All of the ice melts and the temperature of the water decreases to 0 celsius. how many grams of water were in the sample?
an adult female weighting 125lbs must consume 2000 calories of food daily. if this energy is used to synthesize atp
A solution contains 8.88g of KBr in 500.0mL of solution and has an osmotic pressure of 6.97atm at 25 C. Calculate the van't Hoff factor (i) for KBr at this concentration.
Suppose that N2 gas may be described as van der waals gas. This gas (n=1.25 mol) is expanded isothermally and reversibly from a volume of 1 liter to 10 liters at 300K
Standards added to tap water contained 0.160 ng/mL (ppb) of Eu(III), but those added to pond water were 100 times more concentrated. (a) From the x intercepts in the graph, calculate the concentration of Eu(III) (ng/mL) in tap water.
in a laboratory practical exam students were asked to prepare an aqueous buffer solution having a ph close to 9. which
Identify the reactant and product for each of the following enzymes in the citric acid cycle. (Give the names in the order indicated)
Carbonated cola is more acidic than coffee or even orange juice because cola contains phosphoric acid. What is the molar concentration of {H_3O^+} in a cola that has a pH of 4.240? Express your answer with the appropriate units
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