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Part A- Phosphorus-32 decays by beta emission to form sulfur-32. Explain how many half-lives have passed in the reaction shown here?
Part B- The half-life of phosphorus-32 is 14.26 days compute its decay constant.
Part C- If you by mistake spill phosphorus-32 onto your shoe explain how long would it take before 99.9% of the radioactive material has decayed thus that you can safely wear the shoes again?
a 3.0 l sample of sih4 gas at 356 mm hg pressure and 25degc is allowed to react with o2 gas. what volume of o2 gas in
a student begins a kinetics experiment with a solution containing 0.050 starch. at time zero t 0.00 min the student
A 50.0-L reaction vessel contains 1.00 mol N2, 3.00 mol H2, and 0.500 mol NH3. Will more ammonia, NH3, be formed or will it dissociate when the mixture goes to equilibrium at 4000C. The equation is
The initial temperature of the acid was 22.1 degrees Celsius and the initial temperature of the base was 22.1 degrees Celsius. after mixing, the temperature was 27.8 degrees Celsius. the density of the solution is assumed to be .998 g/mL. What is ..
Potash is composed mainly of potassium caronate, K2CO3. If 1.000g of potash reacts with sulfuric acid to produce 145 mL of carbon dioxide gas at STP, what is the % of potassium carbonate in the marble sample
Now consider a sample that consists of four spheres, each with a different mass: blue mass is 4.00 g, red mass is 3.75 g, green mass is 3.00 g, and yellow mass is 1.25 g. Calculate the average mass of a sphere in this sample.
The vapor pressure of water at 25 o C is 23.8 mm Hg. a. Write the balanced chemical equation. b. Calculate the mass (in grams) of zinc metal that was consumed in the reaction.
Strontium sulfate is also an insoluble sulfate. Knowing barium sulfate is insoluble, why is it not surprising that strontium sulfate is also insoluble
Given that Ea for a certain biological reaction is 48kJ/mol and that the rate constant is 2.5 x 10^-2 s-1 at 15 degrees celsius
a projectile is launched with an initial velocity of 300ms at 55 degrees above the horizontal. what is the straight
9.780 grams of gaseous mixture contains ethane ,C2H6 and propane ,C3H8. it needs 1.120mol of oxygen when complete combustion to form CO2 and H2O. Compute the mass percent of C2H6 in the original mixture.
How many grams of Na2SO4 (FM 142.01) should be added to how many grams of sulfuric acid (FM98.08) to give 1.00L of buffer with pH=2.80 and a total sulfur (=SO4^2- + HSO4^1- + H2SO4) concentration of 0.200M
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