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Explain in general terms what a reference sample is and what its purpose is in spectrophotometry.
calculate the molar concentration of all the ions remaining in solution after the reaction has taken place ... Cr(III), hydroxide, potassium, nitrate
Determine the pressure, in torr and atm, of 3.94 mol carbon monoxide gas in a 4.25 Litre tank at temperature 31 degrees Celsius.
What effect on the temperature of a boiling liquid and on its distillation temperature is produced by a soluble, nonvolatile impurity?
What is Ka? The answer is 8.1E-10. Hope you can help
How many milliliters of 0.200 M NaOH will be required to titrate 19.6 mL of 0.479 M H2SO4
What causes cycloalkanes to have two less hydrogen atoms than similar alkanes that are open chain ones?
a column of air with a pressure of 1.57 x 105 Pa and an area of 1.07 m2 and given that the acceleration due to gravity is 9.8 m/s2, what is the mass of the column.
How many grams of magnesium chloride could be formed from the reaction of 6.82 g of magnesium with excess HCl?
How much heat is evolved when 243 g of ammonia gas condenses to a liquid at its boiling point?
In the nitration of methyl benzoate, why do you wash the crystals with water followed by an ice-cold methanol washing? What is the purpose of pouring the reaction mixture over ice?
An unknown compound contains only carbon, hydrogen, and oxygen (C_xH_yO_z). Combustion of 5.50 of this compound produced 8.07 of carbon dioxide and 3.30 of water.
Estimate the pH, and the concentrations of all species in a 0.300 M phosphoric acid solution. pKa1: 2.16 pKa2: 7.21 pKa3: 12.32 Hint: Convert the pKa values to Ka values
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