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A solution may contain any of all of the group 3 cations. Based on the information below, which group 3 ions are present, absent or still in doubt after each of the steps below. a. Treatment of the solution with ClO- in alkaline solution yields a yellow solution and a colored precipitate. Ions Present: Ions absent: Ions in doubt: b. The yellow solution formed in (a) is acidified and treated with NH3. No change is observed. Ions Present: Ions absent: Ions in doubt: c. The colored precipitate in part (a) dissolves in nitric acid. Addition of excess 6M NH3 to this acid solution produces only a blue solution with no precipitate. Ions present: Ions absent: Ions in doubt:
Calculate: a.the rate constant b.the half-life at 500 C c.how long will it take to decompose 65% of the drug?
What is the total number of atoms in one unit (molecule or formula unit) of K2CrO4? What is the total number of atoms in a mole of K2CrO4
Using extraction techniques how would you separate a mixture of aniline and toluene using dichloromethane as the extraction solvent?
Solid NaI is slowly added to the solution that is 0.010 M in Cu and 0.010 in Ag a) which compound will begin to precipitate first? b) calculate Ag when CuI just begins to precipitate? c) what precipitate of Ag remains in the solution at this point..
According to the following reaction, how many moles of zinc hydroxide will be formed upon the complete reaction of 0.292 moles zinc oxide with excess water
The precipitate SnO2·4H2O was removed by filtration. The resulting filtrate and washings were diluted to a total volume of 250.0 mL. A 15.00 mL aliquot was buffered and titration of the lead, copper, and zinc required 35.78 mL 0.001500 M EDTA.
The gaseous product of a reaction is collected in a 25.0 L contained at 27 degrees Celsius. The pressure in the container is 216 kPa, and the gas has a mass of 96.0g. What is the molar mass of the gas?
What is the change in energy, Delta E, in kilojoules per mole of hydrogen atoms for an electron transition from n=8 to n=2? Express your answer in kilojoules per mole to three significant figures.
This strontium isoptope is radioactive, with a half-life of 28.1 years. Calculate how long (in years) it will take for 5.63g of the isotope to be reduced to .354g by decay
A student combusts 504.96 grams of ethene gas, C2H4. How many liters of CO2 (g) are produced at a pressure of 0.993 atm and a temperature of 295 K? C2H4 (g) + 3 O2 (g) ->2 CO2 (g) + 2 H2O (g)
Which of the following pairs of molecules is listed in order of decreasing net dipole moment (from more polar molecule to less polar molecule)? A. CCl4 > SCl4 B. CH2Cl2 > CCl2Br2 C. SF6 > SF4 D. CCl2Br2 > CH2Cl2 Which of the following pairs of mol..
A solution is made by mixing 45.0 mL of ethanol, C2H6O, and 55.0 mL of water. Assuming ideal behavior, what is the vapor pressure of the solution at 20 °C
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