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For the same solution, what is theconcentration of the excess reactant that remains in solution?(remembering that two solutions dilute each other)
Calculate the fraction of atom sites that are vacant for lead atits melting temperature of 327oC (600K). Assume anenergy for vacancy formation of 0.55 eV/atom.
Based on the ionization energies of the alkali metals, which alkalimetal would you expect to under go the least exothermic reaction with chlorine gas?
A photon of ultraviolet (UV) light possesses enough energy tomutate a strand of human DNA. What is the energy of a single UV photon having a wavelength of 24nm?
A student designs an ammeter (a device that measures electricalcurrent) that is based on the electrolysis of water into hydrogenand oxygen gases.
Methanol is produced accorrdingto this equation CO+2H2 yields CH3OH. if 356g CO are mixed with 65g Hydrogen, How much ethanol is produced and how mcuh excess remains after the reaction.
What is the purpose of extracting the organic later with 5% aqueoussodium bicarbonate in the second extraction step? Write theequation for this extraction.
If the half reaction at an electrode is the reduction of zinc fromzinc 2+ ions, how many grams of zinc would be produced from passinga current of 0.5 amps for 2 hours.
A gas with a volume of 525 mL at a temperature of -25 Celsius isheated to 175. What is the new volume of the gas if pressure andnumber of moles are held constant?
An aqueous ammonium chloride solution, rather than sulfuric acid,is used in the hydrolysis of the magnesium complex of1,1-diphenylethanol to ensure that no acid-catalyzed dehydrationoccurs.
A small crystal of I2 is often used to clean the surface of themagnesium metal in the syntheses of Grignard reagents. Write abalanced chemical equation for the reaction of magnesium and molecular io
A 50.00 mL sample of vinegar is titrated with 0.584 M NaOH(aq). If the titration requires 32.80 mLof NaOH(aq), what is the concentration of acetic acid in the vinegar?
Calculate the modulus of elasticity (in GPa) for the nonporousmaterial. At what volume fraction porosity will the modulus of elasticitybe 278 GPa?
Is it possible for some of the aldehyde to not have reacted and beseen in the product mixture? Or does the reaction exclusively yieldan alcohol and a carboxylic acid?
The reaction between ammonia and dinitrogen trioxide to givenitrogen gas and water, NH3(g) +N2O3(g) <=> N2(g) +H2O(g) has a DH value of -500.0 kJ and a DS value of -5kJ/mol K. At what temperat
Determination of the actual concentration ofH2O2 in a bottle of peroxide solution wasdone by diluting 1.00 mL to 100 mL with water, acidifying withdilute H2SO4 and titrating with a 0.01593 M
As the balloon rises in the atmosphere, the pressure and temperature drop. What volume will it have when it reaches analtitude where the temperature is -33 Celsius and the pressure is0.65 atm?
Benzene is often produced as a by-product during the synthesis ofphenylmagnesium bromide. How can its formation be explained? Write a balanced chemical equation for the formation of benzene.
A particular household ammonia solution (d = 0.97 g/mL) is6.8% NH3 by mass. How many milliliters of this solution should be diluted with water to produce 613 mL of a solution with pH = 11.56?
How many grams of dipotassium oxalate (M.W.=166.22) should be addedto 20.671 mL of 0.7097 M HClO4 to provide a solutionwith a pH value of 5.6919 when the solution is diluted to 44.517mL?
A 95.0 gram piece of copper wire is heated to 89.2?C and thenplaced in a calorimeter containing water at 20.4?C. The finaltemperature of the water and copper wire is 23.0?C. The heat capacity of the
What volume of carbon dioxide, measured at STP, will beliberated (that means given off) when 300.08 grams of calciumcarbonate reacts with excess hydrochloric acid (The other productsare calcium chlo
1 L of a buffer composed of acetic acid and sodium acetate has a pH of 4.3. Adding 10mL of 2M sodium hydroxide solution to 100mL of this buffer causes the pH to rise to 4.78.
1.25g sample of a benzoic acid with a heat capacity of 25.0kJ/gwas burned in a bomb calorimeter and the temperature of the calorimeter increased from 25.12 to 27.27 °C.
Check to see if the "odd looking" value should be retained,using the Q test and the 5 ppth test. Circle any normality datathat can be rejected. Calculate the mean, standard deviation andRSD, and rep