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Standard reduction potentials for nickel(II) and copper(II) The standard reduction potential for a substance indicates how readily that substance gains electrons relative to other substances at standard conditions. Consider the following: Ni2+(aq)+2e- -> Ni(s), E red = -0.23V Cu2+(aq)+2e- -> Cu(s), E red = +0.337V What is the standard potential, E cell, for this galvanic cell? Express your answer to four significant figures and include the appropriate units.
Talc (used in talcum powder) has mass composition 19.2% Mg, 29.6% Si, 42.2% O,and 9.0% H.What is the empirical formula of the compound?
a solution of cyclohexane and an unknown solute freezes at 3.3c and 1atm of pressure. calculate the freezing point depresson of the solution
The concentration of each gas once equilibrium is reached. The new equilibrium concentrations if the volume is suddenly halved (still at 298K)
Consider the reaction at 25C 2NO2 --> 2NO + O2 The overall rxn rate = k[NO2]2. The rate constant, k = 1.4 × 10^10 M-1 s-1. If 3.8 moles of NO2 are initially present in a sealed 1.00 liter vessel at 25 C, what is the half-life of the reaction
Compare the IR spectra of cinnamyl alcohol and cinnamaldehyde. What is the major difference
What is the concentration of [Cr2O7 ^-2] in the first dilution add that is made by adding 1.00 mL of DI water to 5.00 mL of the stock potassium dichromate solution?
At volume of 0.200 M K2Cr2O7 will be required to oxidize the Fe2+ iron in 60.0 mL of .200 M FeSO4 solution?
If the lead level in some drinking water is 15pbb how many ml of the water would one have to drink in order to ingest 1 gram of lead
How much heat in kilojoules is required to warm 10.0 g of ice, initially at -10.0^\circ C, to steam at 110^\circ C. The heat capacity of ice is 2.09 J/g ^\circ {\rm C} and that of steam is 1.84 J/g ^\circ {\rm C}. q=?kJ
what is the volume change when 2 kg of water at 6.8 MPa and 93 Celsius expands to 1.6 bar
a sample of ammonia gas at 1.2 atm compressess from 500 ml to 250 ml. if the temerature remains constant, what is the new pressure of the gas? what formulas were used?
The reactant concentration in a zero-order reaction was 7.00×10-2 after 105 and 1.50×10-2 after 350 . What is the rate constant for this reaction.
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