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If the valence shell is considered to be n=4, how many valence electrons are in a stable ion of a period 4 metal?
What is the equilibrium concentration of Cu+ (aq) in a solution that is 0.0200M solution in CuNO3 and 0.450M HCl (aq)
consider an excited-state hydrogen atom. What is the energy of the electron in the n = 3 level? ground state energy
Ethanol is a possible fuel. Use average bond energies to calculate delta Hrxn for the combustion of ethanol.
Calculate pH and the concentration of acetate ion resulting from the mixtureof 400ml of 0.1M formic acid and 100ml 0.1 sodium acetate.
If the same volume of the buffer was 0.330 M in HF and 0.330 M in NaF, what mass of NaOH could be handled before the pH rises above 4.00?
Calculate the mass flow rate and power needed to run the compressor while assuming that oxygen can be treated as an ideal gas and that the gas at the entrance and at the exit is in local equilibrium.
Identify the set of stoichiometric coefficients that balance the reaction equation for the combustion of octane. C8H18+O2--->CO2+H2O
What are the other side products present in this biocatytic reaction?
Calculate the molality of a 20.0 per cent by weight aqueous solution of NH4Cl. (Molecular weight: NH4Cl = 53.5) (b) If this NH4Cl solution is assumed to be ideal and is completely dissociated into ions, calculate the vapor pressure of this solutio..
The gas is allowed to expand against a constant external pressure of 1 bar until it reaches mechanical equilibrium. What is the final temperature of the system. How much work was obtained.
Phenolphthalein is an acid base indicator. What color does it possess in the presence of excess hydrogen (i.e., hydronium) ions?
How much heat is required to warm 219 g of ice from -45.7°C to 0.0°C, melt the ice, warm the water from 0.0°C to 100.0°C, boil the water, and heat the steam to 173.0°C
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