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When Fe3+ react with Na2S, what precipitation formed? Give the correct chemical formula and name for the precipitation.
It takes 3.1 minutes for a 1.000-g sample of a certain isotope to decay to 0.350 g. What is the half-life of this isotope
Problem- A student accidentally extracted the original solution with NaOH (aq) and the NaHCO3 (aq). When he acidified the NaHCO3 extract, no crystals formed.
In a titration of HNO3, you add a few drops of phenolphthalein indicator to 50.00 mL of acid in a flask. You quickly add 26.50 mL of 0.0502 M NaOH but overshoot the end point, and the solution turns deep pink.
A sample of N2 gas occupies 2.40 L at 20oC. If the gas is in a container that can contract or expand at constant pressure, at what temperature will the N2 occupy 4.80 L
The of hydroxylamine, NH2OH is 1.10*10^-8 . A buffer solution is ready by mixing 110mL of a 0.38M hydroxylamine solution with 50mL of a 0.25M solution.
A solution of formic acid (HCOOH, Ka = 1.8 x 10^-4) has a pH of 2.70. Calculate the initial concentration of formic acid in this solution.
How many groups of chemically equivalent protons exist in the following compounds?
If i add amnonia to 1 mL of copper (II) sulfate solution, and i am observing the mixture turn a darker blue what type of chemical reaction is taking place.
That concentration (g / ml) should be prepared with a substance weight of 200g/mol melocular to give an absorbance of 0.8? Assume that the substance has a molar absorbance coefficient of 16,000 and that the cell has a light path length of 1 cm.
a 460 ml sample of oxygen o2 was collected by displacement of water at 24 ? c under a total barometric pressure of 1095
Question- How long did it take for the reaction of styrene with sulfuric acid in water to go to completion. All of the starting material was gone
1.00 mole of pure Cl2 are placed in a 1.00-L container. If x moles of NOCl react, what is the equilibrium concentration of Cl2? Why is the answer C) 1 + x/2
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