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Explain when 0.50 moles of dinitrogen tetroxide gas is placed in a 4 L vessel as well as heated at 127 degrees Celsius 79.3% of it decomposed to nitrogen dioxide gas. Find the kp for the reaction at 127 degrees Celsius.
how many milliliters of 0.2 M KOH are required to titrate completely 650 ml of 0.05 M citric acid
A certain instrument has a has a standard deviation of 1.7280%. How many replicate measurements are necessary if the standard error mean is to be 0.0210%
In which pair of substances below does the substance with the greater entropy not follow the substance with the lesser entropy
calculate the concentration in mol/L and mg/L of a solution prepared by adding 4.00 mL of a 8.26 x 10^-4M stock solution of Allura Red to a 100.00 mL volumetric flask and then filling to the mark with DI water.
If i want to make 400.00 mL of a 0.325 M KNO3 solution, and I have a 0.840 M stock solution on hand, how much of the stock solution will I need to dilute
Explain how many half-lives must elapse before the activity of a radioactive isotope reduce to 1% of its initial value? Explain how long is this time for 87Rb, which has a decay constant of 0.1420 x10-10/yr?
If 4 g of CuSO4 is dissolved in 9.0x10^2 mL of 0.40 M aqueous NH3, what are the concentrations of Cu2+, Cu(NH34 2+, and NH3 at equilibrium? (Kf = 5x10^13)
A sample of propane,C3H8, contains 10.8 moles of carbon atoms. How many total moles of atoms does the sample contain?
The interactions between water molecules can be define as electrostatic or coulombic where areas of positive charge are attracted to areas of negative charge. Depict a cartoon of how three molecules might be arranged in space given this electrosta..
Measurement of the concentration of Fe3+ ions in a saturatedsolution of iron(III) chloride was found to be 0.35M. Calculate the Ksp of iron(III) chloride
A certain elixir is 92 proof. A proof is twice the volume percentage of alcohol in a blend. Ethanol's structural formula is CH3CH2OH with a molar mass of 46 grams/mole. The density is .79 g/ml. How many liters of elixir must one have in order to h..
Initial temp of HCL solution: 22 degree c Mass of magnesium: 0.6 g Moles of mag: 0.025 highest temp of mixture: 63 degree c Delta T: 41 degree c Heat gained by solution
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