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Calculate the energy of a photon of electromagnetic radiation at each of the following frequencies 104.9 MHz 1090. kHz 838.7 MHz express answer in joules using four significant figures
Suppose the volume of this system is compressed to one-half its initial volume and then equilibrium is reestablished. what would be the new equilibrium total pressure.
An aqueous solution is made by dissolving 25.8 grams of magnesium nitrate in 395 grams of water. What is the molality of magnesium nitrate.
Briefly explain why you can make the assumption that all of the SCN- ion in solutions S2-S6 has been converted to FeNCS^2+ ion.
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
The antibiotic paromomycin (P) forms a complex with a particular 27-nucleotide RNA construct (R). Dissociation of this complex can be described schematically (in aqueous solution) as: RP R + P Kd= .520 ..
Liquid NCl3 in a 2.5 L closed container is heated until it decomposes completely to gaseous products. The resulting mixture exerts a pressure
a tire has a pressure of 780 mmhg at 27degc. if the tire is heated to 47degc on hot pavement what the new pressure will
If one were to perform carbon dating on living clams instead of getting a zero age ( they are in fact living) one would get an age of approximately 400 years old for these living clams.
According to the Vsepr theory which one of the following species should be linear, What is the approximate bond angle for H2O?
Five standar solutions of HBr are prepared by serials dilutions in which at each stage 10.00 mL are diluted to 160.00 mL. Given that the concentration of the most dilute solution
100.0mL of a K2HPO4 solution is titrated with 0.1187M NaOH. The endpoint is reached when 115.4mL of OH- has been added. Find out the mass of K2HPO4 dissolved in the original 100.0 mL H2O as well as the pH of the solution at the end point of the ti..
Part A How many shifts must you work if you wish to wash 10 loads of laundry? Part B How many loads of laundry will each shift pay for if the cost per load rises to 8 quarters
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