What fraction of the tritiuminitially in a sample
The radioactive isotope tritium decays with a first-order rate constant k of 0.056 year-1. What fraction of the tritiuminitially in a sample is still present 30 years later?
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If the masses are moved 5 times as far apart, what is their new mutual force of gravitational attraction?
What is the "exact" alkalinity of water ( in mg/L asCaCO3 ) that contains 0.6580 mg/L of bicarbonate, as theion, at a pH of 5.66?
For how long (to the nearest year) should you lease the car so that your monthly payments are lower than if you were purchasing it with an 7%-per-year loan? You should lease the car for how many years or less?
What is the pressure at the bottom of the container? Assume 1000 kg/m3 and 901 kg/m3 for the density of water and the oil, respectively.
You can afford to put $1,500 per quarter into the fund, and you will work for 40 years before retiring. After you retire, you will be paid a quarterly pension based on a 25-year payout. How much will you receive each quarter?
A current of 250 A flows for 24 hours at an anode where [Mn]2+ (aq)is being converted to MnO2 (s). What mass of MnO2 is deposited at this anode?
The width of a slit is 2.00 x 10-5 m. Light with a wavelength of 485 nm passes through this slit and falls on a screen that is located 0.55 m away. In the diffraction pattern, find the width of the bright fringe that is next to the central bright
The concentration of a chemical degrades in water according tofirst-order kinetics. The degradation constant is 0.2/day. If theinitial concentration is 100 mg/L, how many days are required for the concentration to reach 0.14 mg/L?
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