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Write a structural formula for the principal organic product formed in the reaction of methyl bromide with KOCH2CH3(potassium ethaxide)
What is the pH of a solution made by mixing 3.30 mL of 0.0045 molar Sr(OH)2 with 8.70 mL of 0.0011 molar Sr(OH)2 solution?
What mass (in grams) of this substance must evaporate to freeze 200g of water initially at 15 degrees C? (The heat of fusion of water is 334 J/g; the specific heat of water is 4.18 J/g-K.)
determine the freezing-point depression of H2O if 77 g of sucrose (C12H22O11) are dissolved in 400 g of water
If the cylinder is full of air at 72 C and 0.980 atm, how many moles of O2 are present. (The mole fraction of O2 in dry air is 0.2095.)
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a 5.00-ml aliquot of a solution that contains 2.79 ppmfe2 is treated with an appropriate excess of thiocyanate and
Calculate the pH at the points in the titration of 20.00 mL of 0.318 M NH3 of 0.470 M HCl have been added. For NH3, K_b=1.8*10^-5.
The amount of EDTA used for the titration was 13.49 mL. Calculate the total hardness (mg/L or ppm of calcium carbonate) for this water sample. Give your answer to one decimal place.
Write down a balanced chemical equation for polymerization of a w-hydroxy carboxylic acid (HORCO2H)
An open flask sitting in a lab fridge looks empty, but we know that actually it is filled with a mixture of gases called air.
A 1.649-g sample of a solid, weak, monoprotic acid is used to make 100.0 mL of solution. 55.0 mL of this solution was titrated with 0.09012-M NaOH. The pH after the addition of 26.06 mL of base was 7.54, and the equivalence point was reached with ..
How would you prepare 125.0 mL of 0.35 M NaOH solution from a stock solution that has 2.25 M
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