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If cadmium metal and the Fe(III) ion are mixed in aqueous solution, a solution containing Cd(II) and Fe(II) results. The balanced equation for this process is
a. Cd(s) + Fe3+(aq) ? Fe2+(aq) + Cd2+(aq).
b. Cd(s) + 2 Fe3+(aq) ? 2 Fe2+(aq) + Cd2+(aq).
c. 2 Cd(s) + Fe3+(aq) ? Fe2+(aq) + 2 Cd2+(aq).
d. 2 Cd(s) + Fe3+(aq) ? 2 Fe2+(aq) + Cd2+(aq).
e. 2 Cd(s) + Fe3+(aq) ? Fe2+(aq) + 2 Cd2+(aq).
Radioactive nitrogen-13 has a half-life of 10 minutes. After 40 minutes, how much of this isotope would remain in a sample that originally contained 96 mg?
Calculate the ionic strength of 100 mM solution of Mg3(PO4)2 in acetic buffer 100 mM acetic acid
What types of limitations and obstacles must any plausible origin of life scenario overcome, and why did Crick believe life couldn't have formed on Earth?
However, a water transporter was discovered in 1992 and it was named aquaporin. Aquaporin is a single subunit protein that is barrel-shaped and open to both sides of the membrane
Caffeine is a stimulant found in coffee and tea . A solution of caffeine in chloroform as a solvent has a concentration of 7.9 x 10^-2m. What's the percent of caffeine by mass? Calculate the mole fraction of caffeine.
What is the minimum number of liters of air that must pass over a sample of the compound at 25oC to vaporize 1.0 mg of it? Hint: You know the Vapor Pressure from question "a" above and you are given the temperature and mass.
How many orbitals correspond to each of the following designations?
Tell me if an induced current would exist, if you had a coil and a magnetic field that both were in motion at the same time.
What is an indicator and explain how it is used in titration. Enumerate the criteria in choosing the indicator for a specific titration.
A student mixed 75.0 mL of water containing 0.75 mol HCl at 25 degrees C with 75.0 mL of water containing 0.75mo of NaOH at 25 degrees in a foam up calorimeter. The temperature of the resulting solution increased to 35 degrees C.
Find the de Broglie wavelength (in nm) associated with an electron that is moving with a velocity of 1900 km/s. The electron rest mass is 9.11 x 10-31kg.
A 65 L sample of dry air cools from 133°C to -16°C while the pressure is maintained at 2.85 atm. What is the final volume?
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