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In a lab experiment, you are asked to determine the molar concentration of a solution of an unknown compound, X. the solution diluted in half by water ( 1mL of X and 1mL of H2O) has an absorbance at 425 nm of 0.8 and a molar extinction coefficient of 1.5 x 10^3 M^-1 cm^-1. what is the molar concentration of the original solution of X?
the vapor of a volatile liquid is able to fill a 408-mL flask at 100.4C and 765mm Hg, what is the molar mass of the liquid?
Draw intermediate and final products. Cyclopentene ----->NBS above arrow and heat,peroxides below arrow. Give intermediate. Then ----------> NaOCH2CH3 above arrow and CH3CH2OH,heat below arrow. Give products
If 393.5 kJ of heat is released per mole of graphite and T increases 2.613 K, what is the heat capacity of the bomb calorimeter
Consider the following equilibrium 2SO2 + O2 yields 2SO3 The equilibrium cannot be established when is/are placed in a 1.0L container
Calculate the mass of pure water recovered per mass of water in the process feed. A.3) Calculate the weight percent of salt leaving the 5th evaporator. (Note: Thoughtful selection of control volume can save you a lot of algebra.)
how many grams of dry nh4cl need to be added to 2.10l of a 0.500 m solution of ammonia to prepare a buffer solution
How many grams of dry NH4Cl need to be added to 2.50 L of a 0.700M solution of ammonia, NH3, to prepare a buffer solution that ahs a pH of 8.61?
Assume that the volumes are additive, the specific heat of the solution is 4.18 Jg-1°C-1 and that the density of the solution is 1.00 g mL-1 Calculate the enthalpy change, ?H in kJ for the reaction
Calculate the quantity of energy produced per gram of reactant for the fusion of H-3 (atomic mass = 3.016049 amu) with H-1 (atomic mass =1.007825 amu) to form He-4
How many grams of precipitate are formed if 0.27 grams of barium nitrate is mixed with 0.2 L of 0.8 M potassium carbonate?
what is the pH of a solution prepared by mixing 25 mL of 0.10 M methylamine with 25 mL of 0.10 M methylammonium chloride?assume that the volume of the solutions are additive and that Kb = 3.7 x 10^-4 for methylamine
A 6.55 g sample of aniline (C6H5NH2) was combusted in a bomb calorimeter. If the temperature rose from 22.25
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