Greater number of moles
Two full bottles contain respectively 1.0 kg of potassium nitrate, KNO3, and 1.0 kg of strontium chloride, SrCl2. Which bottle contains the greater number of moles? How many more moles does it contain?
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Assuming the solution is ideal, calculate the composition of the vapor (in terms of mole fractions) at 25°C. At 25°C, the vapor pressures of pure CH2Cl2 and pure CH2Br2 are 133 and 11.4 torr, respectively.
A certain first-order reactio has a rate constant of 3.60×10-3 at 45 . How many minutes does it take for the concentration of the reactant to drop to 6.25% of the original concentration?
what are the H3O+ and OH- concentrarions in a 125 mL solution prepared with 0.100 mol pf NaOH and water?
What is the purpose of such an addition? What is the procedure called? Why is the procedure used in this experiment called liquid-liquid extraction?
A total of 2.00 mol of a compound is allowed to react in a foam coffee cup that contains 138 g of water. The reaction caused the temperature of the water to rise from 21.0 to 24.7 C.
A colored substance Z has an absorption maximum at 350 nm. A solution containing 2 mg of Z per liter had an absorbance of 0.850 using a 1 cm cell. The formula weight of Z is 148.
Calculate the change in enthalpy and entropy of 50g of liquid water starting at 10 degrees Celsius and completely evaporating into H2O gas at 100 C.
A remote sensing satellite is deployed in a circular sun-synchronous orbit with inclination 96.85°. A. Calculate orbit altitude (disregard gravitational pull by the Moon and Sun).
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