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You go out and spend a bucket of money on a new stereo amplifier that advertises that it can produce maximum volumes 20 dB greater than your current system. How many times as powerful must this amplifier be?
small samples of oxygen gas needed in the laboratory can be generated by any number of simple chemical reactions such
calculate the molarity and the molality of an nh3 solution made up of 27.5 g of nh3 in 70.0 g of water. the density of
The acid dissociation for a weak acid Hx at 25c is 1.6x10^-8. Calculate the free energy information for x-(aq) at 25c. The standard free energy of Ax(aq)
Use symmetry analysis to generate a molecular orbital diagram for XeF4. As a basis set, consider one σ-bonding hybrid on each F that can be treated the same way as a hydrogen 1s orbital. Ignore the lone pairs/ p orbitals on Flourine.
What is the molar mass of lysine if 750.0 mL of a solution containing 8.60 g of lysine has an osmotic pressure of 1.918 atm? T = 25.0°C
At -14.0°C (a common temperature for household freezers), what is the maximum mass of saccharin (C7H5NO3S) you can add to 1.50 kg of pure water and still have the solution freeze? Assume that saccharin is a molecular solid and does not ionize when..
Consider the reaction H2(g) + I2(g) -> 2HI(g) delta G degrees at 298K = 2.60 kJ/mol. In an experiment the initial pressures are H2=4.26 atm, I2 = 0.024atm, and the HI =0.23atm Calculate A. Dellta G and B. predict the direction of the net reaction
Calculate the molar mass of a nonelectrolyte that lowers the freezing point of 25.00 g of water to -3.9 degrees Celsius when 4.27 g of the substance is dissolved in the water.
How many grams of Na2CO3 Standard must be used if the titration is expected to require 40 mL of 0.1 M HCl titrant?
Calculate the molarity, percent composition by weight, and mole fraction of HCL in an aqueous solution 12 M HCl that has a density of 1.20 g/mL.
What is a zymogen? Is it used over and over like other enzymes? And what is the physiological advantage
Determine the Ka of a 0.1M solution of acetic acid in which the hydronium ion concentration is 1.35 x 10^-3 M
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