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An FM station broadcasts classical music at 89.1 MHz (megahertz, or 106 Hz). Find the wavelength (in m, nm, and A) of these radio waves. m nm A
Calculate the theoretical pH of 0.250 M weak acid, HA. Calculate the theoretical pH of a 2.5 x 10-3 M weak acid, HA, that has a Ka value of 1.2 x 10-4. What happens to % ionization of the weak acid as you dilute the acid?
calculate the approximate mass of KHP required to react with 40.0 mL of 0.125 M sodium hydroxide in titration.
write the full chemical equation upon the addition of NaOH to each of the 3 alanine species mentioned. If there's no reaction, indicate there's no reaction and why.
What is the concentration (in M) of the chloride ion when 16 mL of a 0.625 M solution of sodium chloride is combined with 17.3 mL of a 0.551 M solution of iron(III) chloride to a final volume of 56.5 mL
How many collisions does a single Ar atom make in 1.0 s when the temperature is 25 C and the pressure is (a) 10 bar, (b) 100 kPa, (c) 1.0 Pa
It is then restored to its original state by the extraction of heat at constant pressure. Calculate w for each step and for the total process. What values for w would you calculate if the cycle were traversed in the opposite direction?
What is the freezing point of a solution of 224 g of ethylene glycol (C2H6O2) dissolved in 1000 g of water?
It takes 47 mL of 0.124 M KOH to neutralize 47.8 mL of H2SO4 solution. What is the concentration of the H2SO4 solution? Answer in units of moles/liter
How many grams of NaCl must be added to 250g water to lower the vapor pressure by 1.30 mm Hg at 40 degrees C assuming complete dissociation?
Radioactive radon gas (222Rn) enters an average building at a rate of 5 picocuries per second per square meter of foundation area. Consider a house with a foundation of 400 square meters and a volume of 1000 cubic meters.
A 4.867 g sample of a monoprotic acid was dissolved in water. It took 30.24 mL of a 0.1578 M NaOH solution to neutralize the acid. Calculate the molar mass of the acid.
For a given reaction the following half-life and initial concentration data was collected. Use this data to determine the reaction's order and rate constant.
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