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Write balanced net ionic equation for the neutralization of equal molar amounts of HNO_2 and KOH
A second sample of this acid weighing 2.00 grams is added to the titrated sample and the pH is 4.32. Calculate the molar mass of the unknown acid and determine the value of Ka for this acid.
A line in the emission spectrum of an atom occurs at a wavelength of 560 nm. What is the energy difference between the two energy levels involved in this emission.
A gas is placed in 1.23 L sealed container at a pressure of 0.500 atm and a temperature of 23.0 C. The temperature of the container is increased to 100.0 C.
calculate the molar mass of the acid. B. After 10.00 mL of base had been added during the titration, the pH was found to be 5.87. What is the Ka of the unknown acid
One mole of a monatomic ideal has at a temp of 500K and 6atm pressure is subjected to the following changes: (all are reversible changes)
3.00×10-3 mol of HBr is dissolved in water to make 17.0 L of solution. What is the concentration of hydroxide ions, OH-, in this solution?
The zinc within a copper-plated penny will dissolve in hydrochloric acid if the copper coating is filed down in several spots (so that the hydrochloric acid can get to the zinc).
Suppose that the volume of a particular sample of Cl2 gas is 8.7 L at 895 torr and 24 degrees Celsius. How many grams of Cl2 are there in the sample.
Draw all resonance structures for anisole to show why the methoxy group directs incoming electrophiles
What is the pH of a solution prepared by mixing 25.00 mL of a 0.10 M solution of the weak acid CH3CO2H with 25.00 mL of 0.040 M sodium acetate, CH3CO2Na? Assume that the volume of the solutions are additive and that Ka = 1.8 ?* 10-5 for CH3CO2H.
Calculate the number of grams of alcohol present in 1.00 L of 78 proof gin. The density of ethanol is 0.798 g/mL.
The half life for the first order decay of 99Mo is 66.02 hours. How long will it take for a sample of 99Mo to decay
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