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An ester can also be prepared by carrying out an SN2 reaction between a carboxylate ion (RCO2-) and the appropriate alkyl halide (R'-X). Is this approach possible for the synthesis of aspirin? Explain
determine the volume of .450m napo4 is needed to precipitate all the leadii ions from 190.0ml of .550m leadii
copper-64 is used to study brain tumors. assume that the original mass of a sample of copper-64 is 26.00g. After 64 hours, all that remains is 0.8125g of copper-64. What is the half-life of this radioactive isotope?
The initial pH. the volume of added base required to reach the equivalence point the pH at 12.0 mL of added base
How many grams of solid barium sulfate form when 18.6 mL of 0.160 M barium chloride reacts with 65.1 mL of 0.055 M sodium sulfate? Aqueous sodium chloride is the other product.
a solution is made by dissolving 20.0 g of hcl in 800.00 ml of water. calculate the ph of the solution. if 0.0400 g
consider a reaction in which ferric oxide is converted to iron and gaseous oxygen. If this reaction is only 83% efficient and the ferric oxide is only 87.5% pure, what mass of ferric oxide is required to make 3 moles of iron
Explain why the melting temperature of a double-helical DNA increases when the Na+ concentration increases.
According to the molecular orbital (MO) theory, when atoms bond to form molecules or molecular ions, their electrons are redistributed into molecular orbitals. What is the correct order of the relative energy levels for the molecular orbitals of t..
For the following reaction 2SO3(g)>2SO2 (g)+O2(g), the equlibrium constant Kp is 1.32 at 627 C. What is the equlibrium constant at 627 for the reaction SO2(g)+1/2O2.SO3(g)
Here are the solubilities of a particular solute at two different temperatures. Temperature (c) Solubility (g/100 g h2o) 20.0 42.0 30.0 86.0 Suppose that you have made a saturated solution of this solute using 47.0 g of water at 20.0 °C. How much ..
a 51 kg person drinks 490. g of milk, which has a "caloric" value of approximately 3.0 kJ/g. If only 17% of the energy in milk is converted to mechanical work, how high (in meters) can the person climb based on this energy intake?
An element has a mass of 207 and has 125 neutron in its nucleus. how many protons and electrons does it have and where are they located
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