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An analyst is directed to prepare accurately to four significant figures 100mL of a solution of Na2CO3 that is around 0.25 M. The laboratory supervisor provides a solution of 4.021M Na2CO3, and some pure, solid Na2CO3, and tells the analyst to proceed by whichever method is easier. Give specific outline as to how you would prepare the solution by two different methods, one by dilution and one by weighing pure chemical. (Show calculation, what type of glassware is used, include size and kinds of pipets and flasks)
Separator conditions are 100 psig and 90 degrees F. The well has just been completed; reservoir pressure is believed to be above bubble-point pressure. Estimate a value of solution gas-oil ratio for use at and above bubble-point pressure.
certain substance has a temperature of 30 oC, a mass of 10.2 g and a density of 1.02 g/cm3. What will the % concentration, temperature, mass and density of 20.0 mL of this solution be?
Which solvent gave the fastest reaction; ethanol, or the ethanol/acetone mixture? Explain how the solvent affects the rate in the SN1 reaction.
What mass of CCl2F2 substance must evaporate in order to freeze 109 of water initially at 24 degrees celsius? (The heat of fusion of water is 334 J/g the specific heat of water is 4.18 J/gK .)
In the unbalanced reaction, Sn + HNO3 ---> Sn(NO3)2 + H2), 2.100 grams of Sn(NO3)2 was formed. How many grams of NO were formed and how many moles of HNO3 were reacted? (HINT: the coefficient of Sn is 3).
In a titration, a 0.7529 gram sample of a mixture of solid C6H5COOH and solid NaCl is dissolved in water and titrated with 0.150 M NaOH. The equivalence point is reached when 24.78 mL of the base solution is added.
Calculate the pH when 3.06 g of NaClO is added to 57.2 mL of 0.50 M HClO. Ignore any changes in volume.
the final product was dibenzalacetone. Calculate the theoretical yield of this reaction.
How many grams of Mg(NO3)2 (Mm=147 g/mol) must be added to 405 g of water to make a solution with a colligative molality of 0.125 m?
Predict the electronic configurations of (a) the benzen anion, (b) the benzene cation. Estimate the pi-electron binding energy in each case within the Huckel Approximation.
Determine how many moles of gas were added to the container If the pressure raised to 800. torr,?
Question- A solution of household bleach contains 5.25% sodium hypochlorite, NaOCl, by mass. Assuming that the density of bleach is the same as water, calculate the volume of household bleach that should be diluted with water to make 500.0 mL of a..
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