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What is the concentration of KMnO4 when you mix 2 mL of .160 M KMnO4 with 10 mL of .250 M oxalic acid? Assuming that it took 120 s to observe the color change in the reaction, what is the rate of the reaction?
Dry ice, CO2 (s), has a melting temperature of -78o C and will not form a liquid unless atmospheric pressure exceeds 5.1 atm. The following reaction is conducted at -90o C and 101.325 kPa: CO2 (g) ? CO2 (s)
The pH of 0.5 M HF is 1.88. Calculate the difference in pH when 6.06 g of NaF is added to 205.7 mL of this solution. Ignore any changes in volume. The Ka value for HF is 3.5 x 10-4.
7.41g of O2 are combined with 5.23g NH3 , and the reaction proceeds. What mass of NO is produced?
A solution is prepared by dissolving 10.5 g ammonium sulfate in enough water to make 100.0 mL of stock solution. A 13.00 mL sample of this stock solution is added to 55.00 mL of water. Calculate the concentration of ammonium ions and sulfate ions ..
How many moles of (NH4)3PO4 are present in 100.0 mL of 2.50 M (NH4)3PO4?
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?..
A beaker with 145mL of an acetic acid buffer with a pH of 5.000 is sitting on a benchtop. The total molarity of acid and conjugate base in this buffer is 0.100 M
The temperature of a gas is inversely proportional to its pressure. 2. The volume of a gas is directly proportional to the pressure in torr
The international unit for weighing diamonds and determine the volume of a 0.76 carat diamond if The density of diamond is given=3.51 g/cm3 ?express your answer in units of cm3
63mL of a 1.70 M solution is diluted to a volume of 218 mL. A 109mL portion of the solution is diluted using 117mL of water. What is the final concentration?
If an aluminum scuba tank contains compressed air at 2750 psi, what is the pressure in torr
(a) What is the product. (b) Provide a mechanism showing the formation of the product at a. (c) Suggest a more feasible synthesis condition for the conversion.
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