What fraction of the sample will still be radon
What fraction of the sample will still be radon-222 after 1 week? A sample of radioactive radon-222 was found to have a half-life of 3.823 d. Suppose the radioactive decay to follow the first-order kinetics.
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State the null hypothesis and the alternate hypothesis. What is the decision rule? Compute SST, SSE, and SS totals.
Each block has a heat capacity of 1000JK-1. One block is initially at a temperature of 25C the other is at 75C after Theydon to thermal equilibrium, to iron blocks of equal mass are brought into thermal contact.
At 60.51 degree C a coffee-cup calorimeter contains the 50.0g of water. A 12.4 g piece of graphite at 24.21 degree C is placed in the calorimeter.
An aircraft manufacturer needs to buy aluminum sheets with an average thickness of 0.05 inch. The manufacturer knows that significantly thinner sheets would be unsafe and considerably thicker sheets would be too heavy.
At 200°C the 5.0 moles of PCl5 are placed in a 10.0 L flask and allowed to come to equilibrium. Analysis shows that the 1.0 mole of Cl2 is present in the equilibrium mixture. Determine the numbers of moles of PCl5 are present at th
You are working in marketing dept. of company which makes this microwave and you inquired to find the price p which would yield profit of $9 million. Is this possible?
The solutions start out at 22.50 degrees C, and the densities of the solutions are all 1.00 g/mL and the final temperature after the reaction is 24.28 degrees C, and the specific heat of the mixture is 4.2 J/ (g x C).
Assume that 50.0 mL of 0.400 M HCl and 100.0 mL of 0.200 M CsOH are mixed in a calorimeter. The final temperature after the reaction is 24.28 degrees C and the solutions start out at 22.50 degrees C.
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