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10mL of a commercial peroxide solution measured with a volumetric pipet was diluted to 100mL in a volumetric flask and mixed thoroughly 25 mL of the diluted peroxide was titrated. Assume that the diluted peroxide solution had a density of 1.000 gmL-1.
volume of diluted hydrogen peroxide 25.00 mLmolarity of the potassium permanganate 1.992x10-2 Mpotassium permanganate solution initial reading 1.17 mL, final reading 26.09 mL
a) Calculate the number of moles of KMNO4.b) Calculate the number of moles of H2O2.c) Calculate the mass of H2O2 in the unknown.
d) Calculate the percent H2O2 in the diluted peroxide.
e) Calculate the percent H2O2 in the commercial hydrogen peroxide.
When a He atom absorbs a photon to form the excited configuration 1s^1 2s^1 (here called He*) a weak bond forms with another He to form the diatomic molecule HeHe*. Construct a molecular orbital description of the bonding in this species.
Draw the electron-dot formula for each of the following molecules or ions: a) HCCH (ethyne); b) CS2 (C is the central atom); c) NO^+
what volume of 0.684 m mno4- solution is required to react completely with 27.50 ml 0f 0.250 m fe? this is an
How would you separate a mixture of eugenol and cholesterol
Determine whether each of the phrases or examples describes a thioester, reduced cofactor, or phosphorylated compound:
In a second 50.00mL aliquot, the ClO4- was reduced to Cl- with V2(SO4)3. Titration of the reduced sample required 40.12mL of the AgNO3 solution. Calculate the %KCl and %KClO4 in the sample
Assuming that the 3s- and 3p-orbitals will form molecular orbitals similar to those formed when 2s- and 2p-orbitals interact, according to molecular orbital theory
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0.90 g of hydrogen chloride hcl is dissolved in water to make 2.5 l of solution. what is the ph of the resulting
When a sample of H2S(g) (9.811 mol) is placed in 180.0 L reaction vessel at 724.0 K and allowed to come to equilibrium the mixture contains 0.01627 mol/L of S2(g). What is the equilibrium concentration (mol/L) of H2S(g)? 2H2S(g) = S2(g)+2H2(g)
A 125 lb patient is to receive a drug at a rate of 0.300 mg per 1.00 kg of body weight. If the drug is supplied as a solution containing 5.00 mg/mL, how many milliliters of drug solution should the patient receive
what will the concentration be after 3.00 minutes? B)A zero-order reaction has a constant rate of 3.40×10^?4 M/s . If after 80.0 seconds the concentration has dropped to 3.00×10^?2 M , what was the initial concentration?
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