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A would-be around-the-world balloonist is preparing to make a trip in a helium-filled balloon. The trip begins in early morning at a temperature of 15oC. By mid-afternoon, the temp has increased to 30oC. Presuming the pressure remains constant at 1.0atm, for each mole of helium, calculate
a. The initial and final volumes
b. The change in internal energy
c. The heat transferred
d. ΔH for the process
e. Elucidate the relationship between the answers to (c) and(d)
predict the ratio of the two masses of oxygen that combine with a fixed mass of lead to form PbO and PbO2? PbO:PbO2 oxygen mass ratio= ?/?
Draw the abbreviated structural formula of the products of the complete hydrolysis of lidocain.
500.0 mL of 0.140 M NaOH is added to 625 mL of 0.200 M weak acid (Ka = 8.95 x 10-5). What is the pH of the resulting buffer
Calculate the distances NH3 gas and HCL gas would travel in this experiment if a 100.00-cm tube were used, based on the accepted molar masses of the two gases.
Using the method of successive approximations, what is [H3O+] in 0.00500 M CH2ClCOOH(aq) (Ka=1.4x10^-3) and how many iterations (n) are needed to validate that a constant value had been obtained? Express [H3O+] using two significant figures, follo..
Light with a wavelength of 330nm shines on a piece of metal with a threshold energy of 4.60 eV. What would you expect for the kinetic energy
starting with ethyl ethanoate show the step-by-step mechanism for the base-promoted hydrolysis of the ester to form the
Assume that the reaction is second order in CV. If [CVo]=1.35x10-5M and the value of k = 0.096 l/mol-min, what is the half-life of the reaction.
The mass of the flask (before the sample is placed into the flask) is measured when the outside of the flask is wet. However, the outside of the flask is dried before its mass is measured.
If a student performs an endothermic reaction in a calorimeter, how does the calculated value of delta H differ from the actual value if the heat exchanged with the calorimeter is not taken into account
If a molecule having an ionization energy of 10.96 eV produces a photoelectron having a kinetic energy of 6.77646E-19 J, what is the wavelength of the incident radiation. express answer in nm
If large quantities of chloroform an anesthetic, carbon tetrachloride (commonly utilized in the past for dry cleaning, and tetrachloroethene previously used as a degreasing agent were spilled in the environment
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