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A sample of water has pH of 7.500, and a total alkalinity of 0.003 equivalents/Liter (the former determined by use of a PH meter, and the latter determined by titration with standardized acid to a methyl orange endpoint). Calculate [CO2]
Compute the number of moles of sodium hydroxide ( NaOH ) in 23.75cm 3 of 0.150moldm -3
Calculate the number of moles of Ascobic acid in the 50.00 ml Sample. Titration Volumes of KIO3 Initial Buret reading/ml trial 1=12.54 trial 2=8.78 Final buret reading/ trial 1=38.74 trial 2=34.93 Volume of KIO used/ml trial 1=? trial 2=?
What is the percent yield of CaO in the reaction CaCO3 yield CaO + CO2 if 5.33 g of CaO are obtained when 10.0 g of CaCO3 are used?
A 12-gram mixture of methane, CH4, and ethane, C2H6, is completely combusted in oxygen. If the total mass of H2O produced is 23.4 grams, what was the approximate mass of the methane in the original mixture?
a three carbon species that has a carbon level of zero at each carbon atom. b) two compounds that contain three carbon atoms and have a carbon atom with a carbon level of 1.
how many grams of potassium bromide are required to prepare 350 mL of a .200 M solution.
If solar radiation is 1010 , how many photons strike the leaf every second? Assume three significant figures and an average wavelength of 504 for solar radiation.
Finding Number of Atoms in a Molecule from Molecular Weight, As determined from the gas law, the molecular weight of a substance is eight times the atomic weight
A 100 ppm quininesulfate ( MW = 782.97 g/mol) solution was used as the standard. Assuming that your original (undiluted) sample contained 142 ppm of quinine sulfate, calculate the amount in ppm of quinine in the sample.
Gaseous hydrogen iodide is placed in a closed container at 425 degree celcius, where it partially decomposes to hydrogen and idine: 2HI(g)--->--->H2(g)+I2(g). At equilibrium it is found that (HI)=3.53*10^-3 M,(H2)=4.79*10^-4M, and (I2)=4.79*10^-4M..
Two of these students will report, within experimental error, the same increase in solution temperature for the neutralization. Which are the two students? Explain.
At what temperature would the rms speed of H2molecule be same?
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