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A 0.510-g sample of bleach that is 6.15% NaOCl by mass is treated with an excess of KI and then titrated with 0.0638 M Na2S2O3. What volume is required to reach the end point?
which of the following are oxidation reduction reactions? a)Ca(s)+F2(g)>CaF2(s) b)Fe(s)+2HCl(aq)>FeCl2(aq)+H2(g) c)2NaCl(aq)+Pb(NO3)2(aq)>PbCl2(s)+2NaNO3(aq) d)2CuCl(aq)>Cu(s)+CuCl2(aq)
Friedel-Crafts alkylation and acylation reactions won't work because of the deactivating nitro group present on the benzene ring. Propose an alternate pathway to the ketone product desired
How many Joules of energy are stored in 1 pound (454 g) of sucrose? (Assume: Pressure = 1 atm, Temperature = 25°C; the respective ?Hf° for the reactants and products can be found in the thermodynamic table linked above. Show your calculation
a 0.450-kg ice puck moving east with a speed of 3.00ms has a head-on collision with a 0.900-kg puck initially at rest.
A certain element consists of two stable isotopes. The first has atomic mass of 7.02 amu and a percent natural abundance of 92.6%.
What is the Pauli exclusion principle. Specificity and selectivity are important concepts to understand in terms of chemical binding. Define specificity and selectivity? How do they differ. For a drug which is preferred, specificity or selectivity..
Lactase, an enzyme found in the small intestine, cleaves the milk sugar lactose to yield glucose and galactose. Assuming that the km for lactose is 0.9mM, vmax is 3.5 micromole/min/mg lactase, 5.7 micromoles lactose is presesnt
Consider the titration of a 24.0 ml sample of 0.120 M HC2H3O2 with 0.105 M NaOH. Determine the initial pH.
A solution contains 2.0*10^-3 M Pb^2+ and 1.0*10^-4 M Cu^+. I^- is added to the solution little by little, will CuI (Ksp=1.0*10^-12) or PbI2 (Ksp=7.9*10^-9) precipitate first? Determine the concentration of I^- required to commence precipitation o..
The Ka for acetic acid, HC2H3O2, is 1.8 x 10-5. 1. What is the pH of 50.0 mL of 0.100M solution, if 0.00 mL of base has been added
If the tempurature of the combined solution rises to 27.8 degree C what is the DeltaHrxn (delta heat reaction) (in kJ/mole) for this process?
What is the difference in volume (in mL) between the water vapor and liquid water? (Assume the density of liquid water is 1.0 g/mL.) C. Why is it dangerous to heat a closed container of liquid to its boiling point?
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