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Plutonium-239 has been used as a power source for heart pacemakers. What is the energy obtained from the following decay of 215mg of plutonium-239?
239/94Pu --> 4/2He +235/92U
suppose the electric energy produced from this amount of plutonium-239 is 25% of this value. what is the minimum grams of zinc that would be needed for the standard voltaic cell Zn/Zn2+//Cu2+/Cu to obtain the same electric energy?
at 25 C and 1.0 atm, .25 g of a gas dissolves in 1.00L of water. what mass of the gas dissolves in 1.00L of water at 25C and 3.0 atm
There is a stock 6.00m solution of sodium chloride available in the lab. What volume of this solution would you need to prepare your solution?
Predict the sign of Delta Ssys for EACH of the following processes. -Gaseous Cl2 in the stratosphere to form gaseous Cl atoms. -Gaseous CO reacts with gaseous H2 to form liquid methanol, CH3OH. -Calcium phosphate precipitates upon mixing Ca(NO3)2(..
Calculate the partial pressures of the gases if the total pressure is 2.00atm at a given temperature.
Calculate the root mean square velocity of the CH4 molecules in a sample of CH4 gas at 281 K and at 533 K.
One isotope has a mass of 44.0 amu and has a neutral abundace of 69.5% while the other isotope with the mass of 46.08 amu.
degree C and 600. torr contains 50% helium and 50% xenon by mass. what are the partical pressures of individual gases?
How much heat is required to warm 1.20 L of water from 20.0 degrees C to 100.0 degrees C ? (Assume a density of for the water.)
hydrogen peoxide decays into water and oxygen in a first-order process at 20 degrees celcius. H2O2 yeilds H2O and 1/2 O2 the rate expression is 1.77X10 -5 [H2O2] what is the half life in hours of h2o2.
in general methylamine ch3nh2 is a stronger base than ammonia nh3 and dimethylamine ch32nh is a stronger base than
acetic acid is placed in a flask and is titrated with 25.00 mL 0.100 M sodium hydroxide
How many grams of sucrose ,use be added to 593g of water to give a solution with a vapor pressure 0.953 mmHg less that that of pure water at 20*c
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