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10g of H2O2 impure sample when reacted with KI (solution) produced 0.5g iodine.What is percentage purity of H2O2?(AI=127,AK=39)
Calculate the pH of 0.540 L of a 0.195 M NH4Cl -0.195 M NH3 buffer before and after the addition of the following substances. Assume that the volume remains constant.
What is meant by the term lower in energy? Which is lower in energy, a mixture of hydrogen and oxygen gases or liquid water? How do you know?
carbon tetrachloride reacts at high temperatures with oxygen to produce two toxic gases phosgene and chlorine.ccl4g
Calculate the mass of ethylene glycol (C2H6O2) that must be added to 1.00 kg of ethanol (C2H5OH) to reduce its vapor pressure by 12.0 torr at 35C. The vapor pressure of pure ethanol at 35C is 1.00x10^2 torr.
What assumption did you make about the reaction of KMnO4
Explain what is the stoichiometry between the acid and the base. If .4728g KHP requires 22.86mL of NaOH to reach the phenolphthalein pink end point what is the molarity of the NaOH. Molar Mass of KHP is 204.22 g/mol.
The diameter of a rubidium atom is 4.95A . We will consider two different ways of placing the atoms on a surface. In arrangement (a), all the atoms are lined up with one another.
However, both qsolution and it can be either positive or negative numbers. Based on this a) If the solution cools down, is T a positive or negative number? Explain.
Suppose that a student performing this experiment recorded the concentration of NaOH solution as 0.513 M, instead of the correct value of 0.531 M.
Why is Pyrex glass wool, rather than typical filter paper, used for the filtration of the hot solution of K+, [Al(H2O)2(OH)4]- , excess OH-?
The vapor pressure of water at 20degrees Celcius is 17.5 mmHg. What is the vapor pressure of water over a solution prepared from 2.00x10^2g of sucrose(C12H22O11) and 3.50x10^2g water
Question- Give the symbols for the nuclide that is formed in each of the following radioactive decays by indicating the atomic symbol, atomic number, and mass number of the nuclide. ^11B> 0/0 v+
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