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If a solution of compound S (MW = 300) with a known ? of 40,000 at ?max of 360 nm gave an absorbance of 1.0 in a 1.00-cm cell, how many mg of compound S was present in 1.0 mL of the analyzed solution? (Show your calculations)
A flask contains 0.350 grams of liquid Br( bromine). calculate the number of (Br)bromine molecules present in the flask
aqueous solutions has the strongest ion-dipole attractions: 0.3 M FeBr3, 0.6 M CaCl2, 0.5 M Ba(NO3)2, 0.2 M (NH4)2SO4, 0.9 M KOH.
Write symbol for bromine.What is the atomic number of it in periodic table?How many protons and electrons are there in the atom of bromine?Give the highhest possible and minimal oxidation number for bromine.Determine its molar mass.
If 0.5mL of .3% (mass) ethanol is oxidized with 10mL 0.005M K2Cr2O7 , what volume of 0.05M Fe(NH4)2(SO4)2.6H2O is needed to titrate the excess potassium dichromate
Assuming the final concentration of chloride anion after the addition of hcl (precipitation step) was 0.1M what is the remaining concentration of Ag in the solution
write a 700- to 1050-word paper based on the week one readings on the field of gerontology in which you describe the
Calculate the maximum concentration in M of silver ions in a solution that contains 0.025 M CO3^2-. The ksp of AG2CO3 is 8.1 x 10^-12
Calculate ?rH° for the reaction 2C(s) + 3 H2(g) + ½ O2(g) ? C2H5OH(l) given the information below. C(s) + O2(g) ? CO2(g) ?rH° = -393.5 kJ/mol-rxn 2 H2(g) + O2(g) ? 2 H2O(l) ?rH° = -571.6 kJ/mol-rxn C2H5OH(l) + 3 O2(g) ? 2 CO2(g) + 3 H2O(l) ?rH° = ..
For the reaction N2O4(g) (equilibrium arrows) 2NO2(g), kp = 0.25 at a certain temperature. Calculate the equilibrium pressures of NO2(g) and N2SO4(g) if the initial pressures of the components when placed in an otherwise empty container are as f..
Consider the autodissociation of water as the behavior of an Arrhenius acid. Use this to explain the temperature dependence of the autoionization of water and use it to explain
Calculate the concentration of sulfide in the sample? A similar 10.0-mL sample plus 1.00 mL of 0.030 M sulfide diluted to 25.0-mL give a reading of -224.0 mV
when oxygen is in use in hospital room,no smoking signs are usually posted prominently. Explain.
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