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When chlorine gas is bubbled into a solution of a sodium bromide, the sodium bromide reacts to give bromine, a red- brown liquid, and sodium chloride (table salt). A solution was made by dissolving
What are the relative activating properties of amino and acetamido groups in electrophilic aromatic substitution reactions? Mainly in bromation of aromatics.
A sample volume of 0.5mL was pipetted into a beaker, treated withreagents to produce an indigo color, transferred to a volumetricflask and diluted to 25 mL.The concentration of Fe was found to be2.
Approximately 80% of the mass of a human body consists of aqueoussolutions (spinal fluid, blood, etc.) These solutions areunsaturated salt solutions that are 0.21 M NaCl and have a densityof 1 g/mL
A sample of N2 gas occupies 2.40 L at 20?C. If the gas is in acontainer that can contract or expand at constant pressure, at what temperature will the N2 occupy4.80 L?
A 0.8159 g of KHP was placed in a 50mL volumetric flask and the sample was thoroughly dissolved in water to make 50mL of solution.
For the uncatalyzed decomposition of H2O2(aq) to form H2O(l) and O2(g), the activation energy (Ea) and the change in energy(?E ) are 75.3kJ/mol and -98.1kJ/mol respectively.
In the experiment 2.00 g of salicylic acid (molar mass =138.1 g/mol) reacts with an excess amount of acetic anhydride.Calculate the theoretical yield of acetylsalicylic acid ( molarmass = 180.0 g/m
For the uncatalyzed decomposition of H2O2(aq) to form H2O(l) and O2(g), the activation energy (Ea) and the change in energy(?E ) are 75.3kJ/mol and -98.1kJ/mol respectively. (15Points)
A total of 50 mL of ice water are used in processing the final reaction mixture (including the water used to rinse theprecipitate). How many grams of aspirin could be lost in this process?
What is the length of a helical section of a polypeptide chain of20 residues? What is its length when it is fully extended? (Youneed to get bond lengths and angles using trig functions to get the l
In the determination of the quilibrium constant for the hydrolysis of 5.00mL of SbCl3, 24mL of water was addedand 0.0015 mol SbOCl precipitated.
Dichloromethane and Carbon tetrachloride... What are the partial pressures of these substances in the vapor above a mixturecontaining 1.6 mol of CH2Cl2 and 1.20 mol of CCl4 at 23.5 degrees Celsius?
The melting point of water at the pressure of interest is 0 degreescelcius and the enthalpy of fusion is 6.01 kj/mol. theboiling point is `00 degrees C and the enthalpy of vaporization is40.65 kj/mo
The rate of a particular reaction quadrupleswhen the temperature is increased from 298K to 308K Calculate the activation energy for this reaction.
Benzoic acid is a weak acid that has antimicrobial properties.Its sodium salt, sodium benzoate, is a preservative found in foods,medications, and personal hygiene products. Benzoic acid dissociates
Hematite (iron ore) weighting 70.7g was placed in a flask whos volume was 53.2ml. the flask with hematite was carefully filled with water and weighted the hematite and water weighted 109.3g. the den
Hydrogen atoms have an absorption line at 1.026X10-7m.What is the frequency of the photons absorbed, and what is theenergy diffrence, in joules, between the ground state and thisexited state of the
What is the theoretical atom economy of this reaction? Sodiumcarbonate is the desired product and water and card dioxide are theundesirable wastes.
When 3-methyl-1, 5-pentanediol is warmed with polyphosphoric acid, the major product has a molecular formula C6H12O.
A 3.20 L sample of neon at 4.57 atm is added to a 11.0 L cylinderthat contains argon. If the pressure in the cylinder is 5.13 atmafter the neon is added, what was the original pressure (in atm) of
An unkiwn compound contians only carbon, hydrogen, and oxygen(CHO). Combustion of 3.50g of this compund produced 5.13g of carbon dioxide and 2.10g of water.
You want to make an acetic acid/acetate buffer, pH 5.6, with a volume of 250 mL, and a final concentration of ([AcOH] +[AcO-]) = 0.1 M. You may only use acetic acid and sodium acetate (no strong aci
What is the boiling point of a solution containing 16.0g ofcaffeine (C8H10N4O2)dissolved in 58.0g benzene (C6H6)? Theboiling point of pure benzene is 80.1 degrees Celsius andKbp is 25.3 oC/m.
What are the balanced equations for the combustion of salicylicacid (C7H6O3), p-nitro benzoicacid (C7H5NO4), and phthalic acid(C8H6O4)? Also what are the ΔH's of the reactions?