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Calculate the new volume of a 7.0Liter balloon if the pressure is reduced from 1.0 atmosphere to 0.80 atmosphere (assume the temperature remains constant)
Consider the cell described below: Al/Al3+ (1.00M)//Pb2+ (1.00M)/Pb Calculate the cell potential after the reaction has operated long enough for the [Al3+] to have changed by .60 mol/L. Assume T=25 C
Determine water solubility under normal atmospheric conditions (assuming that Carbon dioxide obeys Henry's law?)
A 370. mL air sample collected at 35°C has a pressure of 550. torr. What pressure will the air exert if it is allowed to expand to 425 mL at 49°C.
What would be the percent by mass of NaI solution prepared by dissolving 95 g NaI in 450 g water?
The temperature of a lead fishing weight rises from 26 degrees Celsius to 38 degrees Celsius as it absorbs 11.3 J of heat. What is the mass of the fishing weight in grams.
You are asked to prepare a buffer with a pH of 9.8. Calculate the volumes of .1 M solutions of NH4Cl and NH3 needed to produce 200mL of the buffer
a student titrates 0.738 grams of an unknown solid, weak acid with 0.1027 Molarity NaOH. What is the molecular weight of the unknown solid, weak acid?
If you had a stoppered flask with basic luminol and then opened it to the air, why would the chemiluminescence be more pronounced than with the flask stoppered? Why is the chemiluminescence even more pronounced with the ferricyanide/hydrogen perox..
What is the molecular formula of a compound with a percentage composition 26.7% P, 12.1% N, and 61.2% Cl and a molecular mass of 695u.
A sample of ethanol (C2H5OH) has a mass of 43.8 g.(a) How many carbon atoms does the sample contain?
Histidine has three ionisable functional groups. Write the equilibrium equations for its three ionizations and assign the proper pKa for each ionization.
The enthalpy of fusion of ethanol is 5.02 kJ/mol, and its enthalpy of vaporization is 38.56 kJ/mol.
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