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Compute the wavelength of the radio waves from
(a) an AM station operating at a frequency of 650 kHz, and
(b) an FM station with a frequency of 95.1 MHz.
What is the frequency of blue light that has a wavelength of 420 nm?
The total molarity of acid and conjugate base in this buffer is 0.100 M . A student adds 7.90 mL of a 0.440 M HCl solution to the beaker. How much will the pH change? The pKa of acetic acid is 4.760
Write balanced net ionic equations for the reactions that occur when the following aqueous solutions are mixed. If no reaction is likely to occur, so indicate.
What is the anode reaction during electrolysis of neutral aqueous copper(II) sulfate using inert electrodes
In the reaction Na + H2O ? NaOH + H2, which of these is true. a. Sodium is oxidized b. Water is oxidized c. Hydrogen is oxidized d. Oxygen is oxidized
Problem- Use the following standard-state free energy of formation data to calculate the acid-dissociation equilibrium constant (Ka) at for formic acid: Compound Gf o (kJ/mol) HCO2(aq) -372.3 H+ (aq) 0.00 HCO2 - (aq) -351.0
How many ATP molecules would be produced by turning glucose to lactate?- And what is its relationship to Futile Cycle?
Which one of the following is the highest temperature?
Addition of a catalyst lowers the activation energy by 15.0 kJ/mol. By what factor (k catalyzed/ k uncatalyzed) does the rate increase at 25 °C?
solution is diluted to a total volume of 278 mL. A 139-mL portion of that solution is diluted by adding 155 mL of water. What is the final concentration?
Explain clearly and concisely how you would accomplish each of the following on a semi-micro scale.
Explain a sample of methane (CH4) gas contains a small amount of helium. Compute the volume percentage of helium if the density of the sample is 0.70902 g/l at 0.0 C and 1.000 atm
1. A certain buffer system that contained 15 mL of 0.1M HA and 50 mL of 0.6M A- was found to have a pH of 9. What would be the Ka for that buffer system?
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