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A 50% by mole solution of ethanol and water is prepared. Both their partial volumes do not equal their pure partial volumes. The total volume is observable, however, there are two unknowns. Using an approximation how can two partial volumes be measured separately?
Which of the following would be expected to be colored?
What is the volume of 0.5694 moles of gold? Density of gold is 19.30 g/mL The atomic mass of gold is 196.97.
Calculate q when 15.8 g of ice is cooled from -22.4 degrees Celsius to -71.0 degrees Celsius (C ice = 2.087 J/g*K)
Consider the compounds water, ethylamine, acetone, and aniline, whose Kb values can be found here. Classify them by whether they can be appreciably (Keq>1) protonated by: pyridinium, CH3OH2 , both, or neither.
Chemical Kinetics - Show that only the reactants of the slow step of a reaction are found in the rate law of the reaction - which of the two steps is slower and which substance (if any) is probably an unstable intermediate?
What salt is produced in each of the following neutralization reactions?
Draw the lewis dot structure oxalate and for carbon dioxide. In terms of electronic structure, what happens when oxalate decomposes
Explain Molecular and Empirical Formulas, Ibuprofen, a headache remedy, contains 75.69% C, 8.80% H and 15.51% O by mass, and has a molar mass of 206g/mol.
Calculate the energy of a photon emitted when an electron in a hydrogen atom undergoes a transition
The ball is used on the driveway at temperature of -7 degree C and feels flat. What is the actual pressure of the air in the ball ? What is the gauge pressure?
An atom is ionized so that it has only one electron. When the electron drops from the n = 4 shell to the n = 1 shell, an X-ray of wavelength 101.20 pm is emitted. What is the atomic number?
The density of a gaseous element at 310oC and 1.02 atm is 2.64 g/L. What is the molecular weight of the element
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