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A Mg / Mg2+ // 2H+ / H2 galvanic cell generates a current of 2.15 x 10^-2 amperes for 205 minutes and in the process 29.9L mL of hydrogen at STP are collected. Calculate the values of Avogadro's number and the Faraday assuming the charge in an electron is 1.602 x 10^-19 coulombs/electron. Also calculate the mass the magnesium anode have lost during the process. The answers will be a number.
sample of anhydrous salt sodium sulfate Na2SO4 is allowed to absord water to form the decahydrate salt.
The difference in aqueous nucleophilicity between Cl- and Br- is observed in the product distribution for the Sn2 reaction of 1-butanol (n-butyl alcohol) but not for the Sn1 reaction of 2-methyl-2-propanol
Use the following data to plot the inflection points for the heating curve of 1 mole of solid octane at its melting point, -56.8 degrees C. The first point should be at -56.8 and the last point should be at 150 degrees celcius.
The rate constant (k) for a reaction was measured as a function of temperature. A plot of ln k versus 1/T (in K) is linear and has a slope of -1.66 10^4 K. Calculate the activation energy for the reaction.
The reaction of 2,2-dimethyl-1-propanol with HBr is very slow and gives 2-bromo-2-methyl-propane as the major product
A researcher is interested in studying the effect of vanadium (V) on egg albumen. He wants to supplement the V to 1 metric ton of his laying hen diet at a concentration of 100 ppm.
Use the molar volume of a gas at STP to determine the volume (in {rm L}) occupied by 15.0 {rm g} of neon at STP.
Draw all possible monochlorination products of 3,3-dimethylpentane, including stereoisomers.
The standard voltage of the cell Ag(s) | AgBr(s) | Br (aq) || Ag +(aq) | Ag(s) is +0.73 V at 25 ?C. Calculate the Ksp for AgBr.
You need to make an aqueous solution of 0.180 M sodium sulfate for an experiment in lab, using a 250 mL volumetric flask. How much solid sodium sulfate should you add ?
A student carefully diluted 25.0mL of 6M NaOH solution in 475mL of distilled water. Calculate the molarity of the diluted solution of base.
Predict whether the following solutions will be acidic basic or nearly neutral a) NH4l b) NaNO2 c) FeCl3 d) NH4F, where NH4+ is Ka=5.6 x 10^10; F is Kb= 1.4 x 10^-11
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