An alkyne of six carbon atoms gives the same single product
An alkyne of six carbon atoms gives the same single product in its reaction either with BH3 in THF followed by H2O2 /OH-, or with H2O/Hg2 /H3O . Draw the structure of the alkyne (containing only carbon and hydrogen atoms).
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You want to determine the protein content in milk with the Kjeldahl method. You take 100 g whole milk and use 100 mL of 0.5 M hydrochloric acid to collect ammonia. You needed 34.50 mL of 0.3512 M NaOH for the back-titration. Calculate the percenta
NH4+ = N+ + NH3 pK =9.24 If the pH is 8.5 and the ammonium(NH4+) concentration in 20mg/L, calculate the ammonia(NH3) concentration in mg/L.
Calculate the ionic strength of a solution that is 0.08 M in La(NO3)3 and 0.06 M in Fe(NO3)2.
A 30 cm-diameter vertical cylinder is sealed at the top by a frictionless 15 kg piston. What will the height of the piston be
Calculate the theoretical yield for the bromination of both stilbenes and cinnamic acid, assuming the presence of excess pyridinium tribromide.
A mason contracted with a general contractor to build an exterior wall from 8-inch CMUs. The wall is 82 feet long and 8 feet high.16The mason must finish the wall in 3 days and gets paid $4 per block.
A car race takes place on a long straight track, at the beginning of the race the car accelerates from rest to some top speed with a (constant) acceleration of 1.13 m/s2, What was the top speed reached by the car
mercury(II) acetate is alowed to react completely with a solution containing 9.718 g of sodium sulfide, how many grams of solid precipitate will be formed. How many grams of the reactant in excess will remain after the reaction
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