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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 and please show the work so I can figure out how you get the answer.
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..
A student mixes 347 mL of water and 254 mL of 8.70 x 10-5 M greenfood dye solution. What is the concentration of this new dilute solution of green food dye?
What is the volume in mL of 0.664 M HCl(aq) needed to neutralize the hydroxide ions present in 32.2 mL of 0.851 M NaOH(aq).
The vapor pressure of water above this solution is found to be 0.3624 atm at 348.0 K. The vapor pressure of pure water at this temperature is 0.3804 atm.
25.0 mL of a calcium chloride solution is added to an excess of aqueous silver nitrate. The resulting precipitate has a mass of 1.25 grams. If the percent yield of this reaction is known to be 85%, calculate the concentration in molarity of the or..
Outline a detailed scheme utilizing extractions that he can use to separate the mixture back into the pure components before the professor finds out.
Calculate the ratio of CH3NH2 to CH3NH3Cl required to create a buffer with pH = 10.10 [CH3NH2]/[CH3NH3CL] = ? I know that the answer is 0.34 but is not wright to write it in this way in mastering chemistry and they are errors in the submission
Suppose the volume of this system is compressed to one-half its initial volume and then equilibrium is reestablished. what would be the new equilibrium total pressure.
what mass of solid LiOH must be added to 1.0 L of 1.35 M hydrofluoric acid solution in order to create a buffer solution
What is the name of the chemical formula Tl2Se. Does Tl have a +2 charge Tl (II)? Do all Roman numerals in chemistry have a positive charge
How many hydrogens are in C16H?, which has 3 ring(s) and 8 double bond(s)? How many hydrogens are in C8H?O2, which has 2 ring(s) and 1 double bond(s)
Plot on the same graph the indicator diagrams for the isothermal reversible expansion of (a) a perfect gas, (b) a Van der Waals gas for which a=0 and b=5.11 x 10^-2 dm3 mol -1, and (c) a Van der Waals gas for which a=4.2 dm6 mol-2 and b=0. Take Vi..
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