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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 rate of decrease in N2H4 partial pressure in a closed reaction vessel from the reaction N2H4(g)+H2(g)?2NH3(g) is 80torr/h . What is the rate of change of NH3 partial pressure in the vessel?
How many grams of copper may be formed by the passage of 22,988 C through an electrolytic cell that contains an aqueous cuprous
Which of the following mixtures will be a buffer when dissolved in 1 liter of water?
39 ml of .2 M HCL and 50 ml of .4 M NaOH are mixed. After mixing, but before they react, what is the new M of the HCL and NaOH?
Determine the pressure of a gas using the ideal gas law - Calculate the pressure inside the vessel after all the dry ice has been converted to CO2 gas.
Suppose that 24 of each of the following substances is initially at 29.0. What is the final temperature of gold upon absorbing 2.30 of heat?
The atomic mass of silver is 107.868 amu. There are two naturally occurring isotopes of silver, Ag-107 (106.904 amu) and Ag-109 (108.905 amu). What percentage of naturally occurring silver is the heavier isotope. A. 42.5% B. 45.4% C. 48.2% D. 49.8..
AgCl has a 78.1% ionic character and a diplole moment of 11.5D. what is the distance between the Ag and Cl atoms?
What is the value of Ecell for a concentration cell that combines silver electrodes in contact with 0.10 M silver nitrate and 0.00003 M silver nitrate solutions? ( E = + 0.80 V for Ag/Ag+)
write the expression for the base dissociation constant for hydrazine, N2H4, a weak base. Hydrazine reacts with water to form the N2H5+ ion.
Serum taken from a patient being treated with lithium for manic-depressive illness was analyzed for lithium concentration. A reading of 251 units was obtained for the intensity of the 671 nm red emission line.
A sample of gas weighs 3.718g and has a volume of 1.4L at .845 torr and 26.0 C. What is its molar mass?
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