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5Fe2+ + MnO4- + 8H+ → 5Fe3+ + Mn2+ + 4H2ONumber of moles of electrons transferred in a two half cell reactions in the above overall reaction are:a. 8b. 7c. 6d. 5
A 25.0-mL sample of 1.00 M NH3 is titrated with 0.10 M HCl. What is the pH of the NH3 before the titration begins? Kb = 1.8 × 10-5
What is the molar mass of 35 g of an unknown substance that depresses the freezing point of .350 kg of water .50°C? Kf for water is 1.86C/m.
Identify (invent??) a salt which has a weak acid as it's cation and a weak base as its anion so that the salt would yield an acidic solution in water.
The activation energy for the following reaction is 60. kJ/mol. Sn2+ + 2Co3+ → Sn4+ + 2Co2+
A newly isolated protein was found to contain 0.493% histidine upon amino acid analysis. What is the minimum molecular weight for the protein (assuming only one His residue per protein molecule)
a)Calculate the final temperature for Cv,m=3R/2.b)Calculate q for Cv,m=3R/2 .c)Calculate w for Cv,m=3R/2 d)Calculate delta H for Cv,m=3R/2 e)Calculate delta U for Cv,m=3R/2
Which of the following processes listed below represents the experiment for measureing an ionization energy?(E--> represents a nuetral element, "m"- represents a metal cation; and X represents a nonmental anion)
Which of the following is a property of acid solutions?
what is the molecular geometry around each central atom: CH2CH2(double bond) C=? C=? Also, for CH3 O CH3 C-O-C C=? O=? C=.
Buffers are typically made by combining a weak acid with its salt or by combining a weak base with its salt. Which of the following will be the other component present in a prepared buffer if one component was NH4Cl?
Cl2(g) + F2(g) 2 ClF(g) Kc = 19.9 For the reaction forming ClF the initial concentrations are as follows: [Cl2] = 0.5 M ; [F2] = 0.2 M ; [ClF] = 7.3 M Is the reaction at equilibrium? If not, in which direction with the reaction shift to reach eq..
Your instructions should include the volumes of the solutions required. (1b) (4 marks) What is the buffer capacity of the resulting solution
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