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For an electron in a hydrogen atom, compute the most likely radius (in Angstroms) of the electron in each of the following states:(a) 1s (b) 2s (c) 3s
mass is obtained in the reaction, what mass of S2O3^2- was present initially, assuming the reaction went to completion? the density of the HSO3^- solution is 1.45 g/cm^3
What percentage error would be introduced in a 35.0 mL sample of liquid if the air bubble comes out of the tip of the buret while the liquid sample is being transferred?
Explain the factors that affect the acidity of carboylic acids. Why does this matter/ give evidence to support your claims and use a reaction
A 50.0g silver object and a 45.0 g gold object are both added to a 55.5 mL of water contained in a graduate cylinder. what is the new water level in the cylinder.
Assuming that the temperature is 293K and using Redlich-Kwong equation of state, calculate the volume of ambient pressure (1 Bar) nitrogen that can be compressed into the cylinder.
If a sample of barium contains 2.3 x 1023 atoms of barium, how many grams of barium are in the sample?
The atomic weight of a newly discovered el- ement is 110.352 amu. It has two naturally occuring isotopes. One has a mass of 111.624 amu.
A compound contains only carbon, hydrogen, and oxygen. Combustion of 138.7 g of the compound yields 203.3 g of CO2 and 83.23 g of H2O.
Calculate the apparent degree of dissociation of the NH4Cl if the freezing point of this solution is -15.3OC?(Molal freezing point constant =1.86 0C)
The vapour pressure of a substance at 20.0 oC is 49.3 kPa and its enthalpy of vaporisation is 40.6 kJ mol-1. Estimate the temperature at which its vapour pressure is 80.0 kPa
If 50.0 of ethanol (density 0.789g/mL) initially at 6.0 is mixed with 50.0 of water initially at 28.2 in an insulated beaker, and assuming that no heat is lost, what is the final temperature of the mixture?
at 25 degrees C calcium fluoride has a solubility product constant Ksp= 3.0*10/\(-11). If enough CaF2 is added to saturate the following solutions, determine the equilibrium concentrations
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