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The activation energy of a certain reaction is 45.4kJ/mol. At 28 degrees celcius, the rate constant is 0.0150s^?1. At what temperature in degrees Celsius would this reaction go twice as fast?
Given that the initial rate constant is 0.0150s ?1 at an initial temperature of 28 ? C , what would the rate constant be at a temperature of 140 ? C for the same reaction described in Part A?
Assume that the H2O2 solution has a density of 1.0g/cm3. What would the mass of 35cm3 of the H2O2 solution be?
A stock solution is prepared by adding 23 mL of 1.6 M Pb(ClO3)2 to enough water to make 50 mL. How many moles of ClO3- are in 24 mL of the stock solution?
Describe the two methods for determing the volume of the vapor In a Molar Mass of a Volatile Liquid experiment? Which method is likely to give more precise results? Why?
A solution contains 0.10 M Ca2+ and 0.10 M Mg2+. What pH range would result in only Mg(OH)2 precipitating? Ksp for Ca(OH)2 is 6.5 ´ 10-6 and for Mg(OH)2 is 7.1 ´ 10-12.
sample of an oxide of tin was heated in the ari and 2.842 grams of tin (IV) oxide was obtained. What was the formula for the original oxide of tin?
How many moles of Allyl Sulfide (C3H5)2S in 23.2g? How many H atoms are in 0.85 mole of allyl sulfide?How many atoms of Carbon are in 4.20 X 10^23 molecules of allyl sulfide.
Using a Sample of 0.3991 grams of an unknown monoprotic acid, HA, which combines with Sodium hydroxide according to the balanced equation HA + NaOH ® NaA + H2O when 35.30 mL of 0.1086 M Sodium hydroxide is required to titrate the acid to the equiv..
Two groups of students prepared the compound acetamide. Group A isolated is a solid with a melting point of 80.5 degrees C. Group B obtained a compound with a melting point of 74-77 degrees C
What is the average mass of calcium in each sample? (Assume that the relative uncertainties in atomic mass are small compared the uncertainty of the total mass.)
showing electron flow with arrows, for the acid-catalyzed hydrolysis of ethyl acetate to acetic acid and ethanol- the reverse of a Fischer esterification reaction.
What is the initial concentration of the Fe2+(aq) solution?
the rate of disappearance of HBr in the gas phase reaction 2HBr(g)-->H29(g)+Br2(g)is .301 at 150 degrees celsius. what is the rate of appearance of Br2?
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