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A sample of material contains contains 20 mg of I ^131. Calculate: A) The number of I ^131 atoms initially present. B) The activity in becquerels and curies. C) The number of atoms that will remain in 40 days. D) The number of atoms that will remain in 80.207 days. E) The time it will take for the activity to reach 0.001 curies.
quantum number representations.1. a.nbspgive all four quantum numbers for the outermost electron in a rubidium rb
At a given temperature, 1.40 atm of H2 and 2.03 atm of I2 are mixed and allowed to come to equilibrium. The equilibrium pressure of HI is found to be 1.305 atm. Calculate Kp for the reaction at this temperature.
If 25 ml of solution A is needed to make a 0.7 liters with a final concentration of 1.5%, what was the concentration percentage of the stock solution
A sample of 1.00 mol of perfect gas molecules, originally at 1.00 atm, with a molar heat capacity at constant pressure of 7/2 R is put through the following cycle:
The overall equilibrium involves Ksp, Ka3 of phosphoric acid and Kw. Construct the constant and show the three equations that apply.
Assume the temperature of the mixture is chosen so that Kp=0.12. Predict the effect on the partial pressure of SO3 as equilibrium is achieved by using Q, the reaction quotient.
The angular momentum quantum number (?), the magnetic quantum number (m?), and the spin quantum number (ms) have strict rules which govern the possible values. Identify allowable combinations of quantum numbers for an electron
The total pressure for a mixture of N2O4 and NO2 is 1.5 atm. If Kp=7.1 (at 25 degrees C) calculate the partial pressure of each gas in the mixture. 2NO2(g) N2O4(g)
a constant push of 250N is necessary to slide a crate weighing 400N along a 2.0-meter-long ramp. if the ramp rises 1.0m, what is the efficiency of the ramp.
If 27.0 mL of 0.0200 M KMnO4 were required to titrate a 0.425 g sample of K3[Fe(C2O4)3] * 3H2O, what is the % purity of the complex
how many cans of Mountain Lightning would an individual have to drink to die from a tartrazine overdose If the LD50 of tartrazine in humans is supposed to be 12,750 mg/kg (as it is for mice) and the average human weighs 70 kilograms,?
What are the units of the universal gas constant R? When can a real gas behave as an ideal gas? Are these conditions met in this experiment?
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