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Prepare a model of 3-penten-2-one. Are stererisomers possible here? Explain. Are any of these chiral? This system is said to be conjugated. Why?
Why is the temperature 60 instead of 328K?
If the water initially has a temperature of 26 0C, how many kilojoules of heat must be removed to cool and freeze the water at 0 0C?
A normal value for blood cholesterol is 200mg/dl of blood. If a normal adult has a total blood volume of 5 L, how much total cholesterol is present.
A buffer solution is prepared by adding 5.50 g of ammonium chloride and .0188 mol of ammonia to enough water to make 155 mL of solution . What is the pH of the buffer?
a)is the half reaction an oxidation or reduction b)what substance is oxidized or reduced c)at which electrode would this half reaction occur
what is the minimum velocity that the fluid should travel at in order to remain in the most efficient flow regime for heat tranfer if the fluid is i)water ii)paraffin oil iii) helium (1 atm) in each case Tinfinity= 75 deg
A Breathalyzer instrument contains two ampules, each of which contains 0.75 mg K2Cr2O7 dissolved in 3 mL of 9 mol L^-1 H2SO4(aq). One of the ampules is used as reference. When a person exhales into the tube of the Breathalyzer, the breath is direc..
What are some sources of errors that are associated with standardizing a solution/titration, how can these errors be prevented
You have a sample that consists of 8.2 (+ or -)o.1mL of aqueous 239Pu solution. You measure two 10mL aliquots by liquid scintillation counting and get 3211.4 cpm and 3315.2 cpm, respectively.
Cesium chloride crystallizes in a cubic unit cell with Cl- ions at the corners and a Cs ion in the center. 1. Count the numbers of positive and negative charges
Regarding the Human Genome Project (HGP) ~ Do you expect this sort of work to yield additional medical therapies as time goes on
The volume of HI(aq) required to reach the equivalence point : (1c) The pH at the half-neutralization point. (1d)The pH at the equivalence point.
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