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How many joules of heat are required to heat 143 g of aluminum from 55.0 oC to 66.5oC?
Describe the effect that the following procedural changes would have on the percent recovery of acetanilide. Rather than adding 0.5ml portions of boiling solvent to acetanilide, student added 5ml portions
what would be the effect on this experiment if the student Aceton +benzaldehyde ----> dibenzalacetone a. added half the amount of benzaldehyde?
What is the identity of the precipitate and what is the change in enthalpy of the reaction per mole of copper? Assume the calorimeter absorbs negligible quantity of heat and the specific heat and density of the solution are that as pure water.
A specimen of aluminum having a rectangular cross section of 15 mm x 18 mm is pulled in tension with 55,000 N force, producing only elastic deformation. Calculate the strain
Magnesium metal is used as a sacrificial anode to reduce the corrosion of underground storage tanks (made of iron, more accurately steel). As a result the sacrifical metal corrodes instead of iron. Explain
A particular snack mix contains 1.30 g of salt per 100 g of the mix. How much mass of the mix can be consumed and still be within the FDA limit of 2.40 g of salt.
Calculate the value of the rate constant. Pick the choice from below which gives the correct reaction order and value of the rate constant for this reaction.
For analysis, a short peptide seven residues long is treated with FDNB, followed by complete acid hydrolysis and amino acid chromatography. What are the products of these steps. What kind of information can be obtained by amino acid chromatography..
Suppose that an 90.0 g laboratory animal ingested 10.0 mg of a substance that contained 2.55% by mass Pu-239, an alpha emitter with a half-life of 24,110 years. a) What is the animal's initial radiation exposure in Curies?
Which of the following is (are) formed in the reaction between propyl hexanoate and methylamine. (must select all products which are formed in this reaction)
NH3 is a weak base (Kb=1.8 x 10^-5) and so the salt NH4Cl acts as a weak acid. What is the PH of a solution that is 0.039 M in NH4Cl?
When you heated the hydrated compound this process starts slowly at first find out the reason behind this and compute k for this acid if A 0.020 M solution of weak acid HA is 0.60% ionized.
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