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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.
what quantity of heat would be involved if 75.00g of mercury (Ar(Hg)=200.59,Ar(O)-16.00) was burned in oxygen.
Carbon monoxide detectors sound an alarm when peak levels of carbon monoxide reach 100 parts per million (ppm). This level roughly corresponds to a composition of air that contains 400,000 micrograms per cubic meter of air.
An aqueous solution is 30.0 % by mass ammonia, NH3, and has a density of 0.892 g/mL.The mole fraction of ammonia in the solution is?
When 2.45 g of an unknown weak acid HA with a molar mass of 85.0g /mol is dissolved in 250.0g of water, the freezing point of the resulting solution is -0.256 C.
High levels of ozone (O3) make rubber deteriorate, green plants turn brown, and cause people to have difficulty breathing. Calculate delta G at 298 K for the formation of 1 mole of O3 from O2 in urban smog, where [O2]=0.210 atm and[O3]=5.00x10^-7 ..
what is the final ph of, a solution of 30ml of .2 m formate titrated with 25 mL of .24M HCL Kb for formate = 5.6*10^-11
Calculate the standard potential for this reaction. Normally, X is Fe. Here it is some unknown metal, allowing for somewhat random values for ΔGo.
Rank each of the following measurements from smallest to largest
A 50 mL soln. of Mg(NO3)2 is mixed with a 50 mL solution of NaOH. The resulting precipitate, Mg(OH)2, that forms is 2.97g. Determine the concentration of solution of Mg(NO3)2
What causes the colors of fireworks. Where do the colors come from? How do we get so many different colors. Give at least onr example of a compound responsible for such characteristic color.
if 40.0 kJ of energy is absorbed by 500.0 g of water at 10.0 degrees celcius what is the final temperature of water?
A certain laser uses a gas mixture made up of 9.00 g HCL, 2.00g H2, and 165.0g Ne. What pressure is exerted by the mixture in a 75.0 L tank at 22 degree C?
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