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One type of commercial smoke detector contains a minute amount of radioactive americium-241 (241Am), which decays by alpha-particle production. The alpha-particles ionize molecules in the air, allowing it to conduct an electric current. When smoke particles enter, the conductivity of the air changes and the alarm buzzes.
The complete decay of 241Am involves successive alpha, alpha, beta, alpha alpha, beta, alpha, alpha, alpha, beta, alpha and beta production. Identify the 11 intermediate nuclides.
What is the final stable nucleus produced in this decay series?
Toluene (C6H5CH3) is a liquid compound similar to benzene (C6H6). Calculate the mole fraction of toluene in the solution that contains 138 g toluene and 106 g benzene.
The percentage of an additive in gasoline was measured six times with the following results: 0.14, 0.15, 0.16, 0.17, 0.20, 0.11%. Find the average and RSD and 90% confidence intervals for the percentage of the additive.
the following reaction were found to be PA = 4.00 atm, PB = 8.40 atm, PC = 5.70 atm, and PD = 1.60 atm. What is the standard change in Gibbs free energy of this reaction at 25 °C.
Draw a logarithmic concentration diagram showing the relationship between [CO2] and [Ch4] as a function of pE for pH=7 and [CO2] +
the same bulb is placed in a heated oven, and the pressure is measured as 648 mm Hg. What is the temperature of the oven in °C?
The first-order decomposition of SO2Cl2 to sulfur dioxide gas and chlorine gas at 320°C has a half-life of 8.75 hr. If one begins with 600. mmHg of pure SO2Cl2 in a 5.00-L flask at 320°C
Molar mass from volumetric data, 2.64g of an organic base, isolated from a shrub in the mountains of Peru was dissolved in 100mL of water. 25.0mL of this solution required 27.5mL of 0.250mL HCL for complete neutralization
Isopropyl alcohol is mixed with water to produce a 31.0% (v/v) alcohol solution. How many milliliters of each component are present
The vapor pressure of water at 26 degrees C is 25.209 mmHg. How many moles of gas were collected?
How much 0.500M Au(no3)3 solution would you need to prepare to accomplish this? C. What is the mass of gold transferred to the medallion?
A standard basketball has a volume of 7.47 L. What is the volume of the basketball in gallons? The speed limit on many United States highways is 65.0 miles per hour
Calculate the amount of heat required to completely sublime 73.0 g of solid dry ice (CO2 ) at its sublimation temperature. The heat of sublimation for carbon dioxide is 32.3 kJ/mol.
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