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A certain flexible weather balloon contains helium gas. Initially the balloon is at sea level, where the temperature is 25 °C and the barometric pressure is 720 torr. The balloon then rises to an altitude of 6000 ft, when the pressure is 605 torr and the temperature is 15 °C. What is the change in volume of the balloon as it ascends from sea level to 6000 ft?
a.15 V1 = V2
b. 0.75 V1 = V2
c. 1.21 V1 = V2
d. 0.71 V1 = V2
2noclglt--gt2nog cl2ga pressure of 0.600 atm of nitrosyl chloride is sealed in a flask and allowed to reach
The activity of a radioactive element, El, decreased by 2.0 % over one year. What is the half-life of this element in years
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If 100.0J of energy are added to 25.0g of water at 50 degrees celcius,what will the final temperature of the water be?
you have a 1.0cm3 sampleof lead and a 1.0cm3 sample of glass. you drop each in a separate beaker of water. how do the
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A nurse was accidentally exposed to potassium-42 while doing some brain scans for possible tumors. The error was not discovered until 36 hours later when the activity of the potassium-42 sample was 1.9 aCi.
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Use the graph of solubility of O2 in water versus temperature to calculate the value of Henrys law constant Kh for O2 at 8 and 33 degrees Celcius.
A pipet delivers 10.5, 10.3, 10.9 and 10.7 ml. (a)find the mean volume and deviation from the mean for each and calculate the average deviation from the mean. (b) calculate the relative deviation (in %) for this set of data.
Potassium hydroxide is used to precipitate each of the cations from their respective solution. Determine the minimum concentration of KOH required for precipitation to begin in each case.
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