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1. The chemical formula for Ammonia is NH3. what does this tell us about the atoms that make up a molecule of ammonia?
Choose any one chemical process industry, and describe various types of reactors used in that Industry. Diagrams and neat flow sheets may be included wherever they are relevant The student should critically anlyse the use of a particular type of r..
A 13.4 mL sample of vinegar, containing acetic acid, HC2H3O2, was titrated using 0.554 M NaOH solution. The titration required 20.65 mL of the base. Assuming the density of the vinegar to be 1.0 g mL-1, what was the percent (by mass) of acetic acid..
Draw a mechanism for the dehydration of cyclohexanol catalyzed by phosphoric acid.
Write a stepwise mechanism using arrows to show movement of electrons for the reaction of 1-butyne with hydrogen bromide to produce 2,2-dibromobutane. CH3CH2CCH + 2HBr --------->CH3CH2CBr2CH3
A gas-phase decomposition is first order with respect to the reactant, R. If the initial concentration of R is 1.0E-4 mol L-1 and the rate constant k=1.08E-6 s-1, what concentration of R remains after 25 days
Enough of a monproctic acid is dissolve in water to produce a 0.0147 M solution. The pH of the resulting solution is 2.31. Calculate the Ka for the acid.
Benozoic Acid has a Ka = 6.3*10^-5. A 35.0mL sample of 0.130 M Benzoic Acid is titrated with 0.150M NaOH solution. Find the pH after 0.0mL NaOH is added.
It takes 47.0 to raise the temperature of an 10.6 piece of unknown metal from 13.0 to 24.7. What is the specific heat for the metal?
Enzyme can react with only a single substrate. Enzyme has a cofactor that promotes the catalytic activity
Phenol is a common organic compound that may be used as a disinfectant. Its pKa in water is 10.0 while in methanol its pKa = 14.4. Is it a stronger acid in water or methanol? Explain the difference in the pKa for phenol in the different solvents.
How do I determine if an ionic compound has the crystal structure of a simple cubic, a body-centered cubic or a face-centered cubic. E.g. NaCl has a structure based on a face-centered cubic lattice. Why is that
An environmental engineer analyzes a sample of air contaminated with sulfur dioxide. To a 500-mL sample at 700. torr and 38 degrees celcius, she adds 19.50 mL of 0.01017 M aqueous iodine
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