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Analytical Process
Giving examples, explain what inter-laboratory comparisons are and how they help maintain and enhance the quality of analysis.
(100 marks)
What is the molecular geometry of Cl2CO?
Write a balanced hydrolysis equation to show why solutions of aluminum chloride are acidic. (Hint; Al3+(aq) ions can be written Al(H2O)63+(aq).)
Presume that we have a mixture of N2 (g) and O2 (g) of unknown composition whose total pressure is 385torr. If all the oxygen as is removed from the mixture by reaction with phosphorus, which doesn't react directly with nitrogen then the new press..
Why is the number of microseconds in a week NOT considered an exact number? Aren't there 10^6 microseconds in a second, 3600 seconds in an hour, 24 hours in a day, and 7 days in a week?
Considering resonance, arrange the following molecules and ions in order of increasing SO bond order.
what is the value of Kc for the following reaction at equilibrium: CO2(g) + H2(g) CO(g) + H2O(g) if [CO]=.20 M, [H2O]=.30 M, [CO2]=.30 M, and [H2]=.033M?
A large pond is 300m by 95m with an average depth of 2.5m. Assuming that the pond is saturated with oxygen, calculate the amount of sugar (C12H22O11) in kg that would be sufficient to completely consume the dissolved oxygen.
to the alchemists gold was the material representation of purity. it is a very soft metal that can be hammered into
Calculate the rate at each time interval & average rate for the reaction and determine the rate of each time interval, and then calculate the average rate for the reaction in terms of [H 2 O].
An environmental chemist obtained a 200 mL sample of lake water believed to be cntaminated with a single monoprotic strong acid.
State mechanism of aniline to acetanilide using ethanoic acid and ethanoic anhydride, then write mechanism of acetanilide top-bromoacetanilide using bromine, then state mechanism ofp-bromoacetanilide to 4-bromoaniline using NaOH & HCl.
How much will you pay for gasoline if you drove to Alltel Football Stadium in Jacksonville to watch the Dawgs play the Gators, if the round trip is 736.8 miles in a car that get 14.06 km/L if gasoline costs $1.679/gallon
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