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In the reaction A+3B--->2C+D, the inital rate of dissearance of A is 2.0 mol/sec. What is the rate of disappearance of B? What is the rate of appearance of C?
Calculate the concentration of cadium chloride contaminant in the original groundwater sample. Round your answer to 2 important digits.
Calculate the amounts of Na2HPO4 and NaH2PO4 (in grams) needed to prepare 200 mL of a buffer with pH = 8.25 so that the sum of concentrations
Draw two equivalent resonance forms for nitric acid and three for nitrate ion. Rank the three types of nitrogen-oxygen bonds in order of length.
Determine the molar ratio of sodium borohydride to 9-fluorenone that you used in the experiment.
A gaseous reaction occurs at a constant pressure of 40.0 atm and releases 68.0 kJ of heat. Before the reaction, the volume of the system was 9.00 L. After the reaction, the volume of the system was 2.00 L.
Write the net ionic equations for the reactions.
A bicycle tire contains nitrogen, oxygen, and argon gases.If the partial pressures are 48.0 , 14.5 , and 0.4 , what is the total pressure (in atm)
Measurements also show that a certain sample of the unknown compound contains 6.9 mol of oxygen and 2.32 of chromium
A solution of PbI2 has [Pb2+] = 4.5 x 10-5 and [I-] = 6.5 x 10-4. PbI2 has Ksp = 8.7 x 10-9. Write down the reaction that is taking place. Calculate Q. Is Q larger or smaller than the Ksp? Is the solution unsaturated, saturated, or supersaturated?..
The d-d transition in [Ti(H2O)6]+3(aq) produces an absorption maximum at 500 nm. What is the magnitude of ? for this complex in kJ/mol? HINT: E = h ? and c = ?
arrow notation to draw the mechanism for the formation of polystyrene from styrene and benzoyl peroxide.
find the molarity of an unknown NaOH solution if 0.5536 g of the KHP required 37.00 mL of a NaOH solution.
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