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When an aqueous NaCl solution is electrolyzed, how many faradays need to be transfered at the anode to release .100 mol of Cl2 gas
If a current of 40 mu A (40x10-6A) is drawn from a solar cell for 6 months, how many faradays are involved
Complete and balance the following chemical equation using the smallest whole number coefficients. Assume the reaction takes place in acidic aqueous solution. Use H + to balance charge, not H 3 O +
What is the pressure (in mmHg) of the gas inside the apparatus below if the atmospheric pressure is Patm=775 mmHg, h1=20 mmHg, and h2=50 mmHg
Hydrogen peroxide, H2O2, is used to disinfect contact lenses. What volume of O2, in mL, of O2(g) at 35°C and 731 mmHg can be liberated from 50.0 mL of an aqueous solution containing 3.00% H2O2 b
If 0.00523 mol N2O(g) effuses through an orifice in a certain period of time, how many moles of N2O5(g) would effuse in the same time under the same conditions
of an apparatus that could be used to electroplate a ton spoon with Ag. Label the anode and cathode, suggest an electrolyte, and write the anode and cathode half reactions. explain how the process t
Which of the following species would you expect to be diamagnetic and which paramagnetic? (a) K+; (b) Cr3+; (c) Zn2+; (d) Cd; (e) Co3+; (f) Sn2+; (g) Br.
Why is the density of an ethanol/water mixture dependant on temperature? and how would the density of the ethanol/water change IF the temperature was increased and decreased
A 74.8 g sample of copper at 143.2°C is added to an insulated vessel containing 165 mL of glycerol, C3H8O3 (l) (d = 1.26 g/mL), at 24.8°C. The final temperature is 31.1°C. The specific h
22.2 mL of 2.50 M stock solution of sucrose is diluted to 50.0 mL. A 11.9 mL sample of the resulting solution is then diluted to 45.0 mL. A 20.0 mL sample of this solution is then diluted to 75.0 mL
Draw the skeletal structure for trans-1-bromo-2-isopropylcyclopentane. (Hint: Make sure the tapered end, i.e. the thin end, of the wedge bond is attached to the parent.)
The spatial relationship between the hydrogen on C-1 and the hydrogen on C-2 in the most stable chair conformation is: gauche, eclipsed with a 0 degree dihedral angle, eclipsed with a 120 degree dih
calculate the amount of heat(in kj) required to convert 94.6g of water to steam at 100 degrees celsius. (the molar heat of vaporization of water is 40.79 kj/mol)
The compound trichlorosilane (SiCl3H) has a vapor pressure of 0.258 atm at -2 degrees celsius. What is the normal boiling point ( the molar heat of vaporization of Trichlorosilane is 28.8 kj/mol)
Drinking water in the USA cannot exceed 0.5 ppm mercury. What mass of mercury is present in 1.3 L of water at this concentration. What is the molar concentration of mercury
How much heat (in kj) is needed to convert 776g of ice at -10 degrees celsius to steam at 126 degrees celsius. (the specific heat of ice water and steam are 2.03 J/g . C, 4.184 J/g . C, 1.99 J/g . C
A 2.78 10-4 M solution of a compound has an absorbance of 0.451 at 520 nm in a 1.00 cm cell. The solvent's absorbance under the same conditions is 0.019. What is the molar absorptivity of the unknow
What is the density of Ar gas (molar mass, 39.95 g mol-1) at 21.2oC and 1.10E2 kPa? Give your answer in grams per litre (g L-1), accurate to three significant figures
During the electrolysis of an aqueous solution of CuSo4 using inert electrodes, the mass of the anode remains the same but the cathode gains mass
Draw the skeletal structure for trans-1-bromo-2-isopropylcyclopentane. Make sure the tapered end, i.e. the thin end, of the wedge bond is attached to the parent.
What is the Brownian diffusivity of a 0.2 um (micrometer) particle in air? Assume T = 293 K and P = 1 atm.
The decomposition of phosphorus pentachloride by the reaction: PCl5(g)<->PCl3 (g) + Cl2 (g) has a Kp = 1.8 at 450C. What is the value of the standard free energy change
if 1.0 mol of electrons flows through the cell, how many grams increase or decrease in mass will the silver electrode undergo