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A 0.9550g sample of a creation metal reacts with acid to liberate 380mL of hydrogen gas when collected over water at 20 degrees C and 720torr total pressure. Explain what is the equivalent mass of the metal? Explain what metal could it be?
sodium borohydride reduction experiment write the balanced equation for the reaction and calculae the percent yield
In a second-order reaction the rate constant is 4.00 × 10?4 M?1 s?1. What is the concentration of reactant after 10 min if the initial concentration is 0.800 M
Using phosphoric acid, what concentrations are needed to give a pH 8.10 solution with an ionic strength of 0.100 M?
determine the theoretical yield and the percent yield of ethanol if 684 g of sucrose undergoes fermentation and 349 g of ethanol is obtained
c2h5i alc oh- alc --gt c2h5oh alc i- alcbased on the above chemical reaction the activation energy wasdetermined to
Give the steps to prepare the column required for the best purification of 0.40g of crude product using silica
The possible compounds are listed below. Two methods of positive identification are required for each compound. Benzoic acid benzoin 1,4-dibromobenzene flourene o-Toluic Acid 4-aminoacetophenone
when 500 L of a 2.0 M solution of Pb(NO3)2 is mixed with an excess of 1.00 M solution of KI, how many grams of lead(II) iodine are formed?
The atomic absorption signals were A=0.22 for the unspiked sample and 0.37 for the sample spiked with the additional gold standard. Assuming that the signal is linear over the measured absorptions, what is the concentration of gold in the original..
Our quality control department is being moved to a different location and will not be able to handle any projects for a few weeks.
A- What is the pH of a buffer prepared by adding 0.809mol of the weak acid HA to 0.305mol of NaA in 2.00L of solution? The dissociation constant Ka of HA is 5.66 X 10^-7 B- What is the pH after 0.150mol of HCL is added to the buffer from Part A
If the standard deviation of your pipet is 0.018 mL, what is the chloride concentration ppt (W/V) of you sample?
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