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How does a radioactive atom's half-life influence its effect on its environment? Why is it important for chemists to take this into account?
If a 220 mg piece of gold (density =19.32 {rm g}/{rm cm}^{3}) is hammered into a sheet measuring 2.5times1.0 {rm ft}, what is the average thickness of the sheet in meters?
Calculate the pH of a solution formed by mixing 250.0 mL of 0.15 M NH4Cl with 100.0 mL of 0.20 M NH3. The Kb for NH3 is 1.8 x 10-5.
what is the volume percent of a solution prepared by dissolving 43 g of NaOH in enough water to make a final volume of 120 ml.
An Ideal gas originally at a temperature T1 and pressure P1 is compressed reversibly against a piston to a volume equal to one-half its original volume, Draw a diagram of the process in the P-V plane.
25.00 mL of 0.1000 M chlorous acid, HOCl = O is titrated with 0.1000 M NaOH. Calculate the pH of the solutions when 0.00, 2.00 and 24.00 mL of the titrant was added.
A sample of 1 mol Kr expands reversibly and isothermally at 373 K from 1L to 10L. Use the virial equation of state up to the second coefficient B= -20 cm3 mol-1 and dB/dT= -25 cm3
Calculate the entropy of mixing if two moles of N2(g) are mixed with one mole O2(g) at the same temperature and pressure, assuming ideal behavior.
In the following compound [CoCl(NH3)4(H2O)]SO4, write the formula and charge(if applicable) for: a) the ligands b) the complex c) the coordination sphere
How many grams of sodium fluoride should be added to prepare the buffer solution? Neglect the small volume chane that occurs when the sodium fluoride is added.
Explain what happens upon addition to a strong acid to the following equilibrium without using the Le Chatelier principle. What happens upon addition of a strong base
Compute the molarity of a solution prepared by dissolving 15.2 grams of CaCl2 in H2O with a solution volume equal to 5.00 x 10² millimeters.
For the decomposition of solid ammonium chloride into ammonia gas and hydrogen chloride gas Kp = 1.1 x 10-16. Calculate the change in standard free energy for this decomposition reaction.
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