What are the h3o+ and oh- concentrarions
what are the H3O+ and OH- concentrarions in a 125 mL solution prepared with 0.100 mol pf NaOH and water?
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Assume that a reaction takes place at 295 K and 305 K. What must the activation energy be for the rate constant to double as described?
The two sides of a V-shaped water trough are hinged to each other at the bottom where they meet, as shown in Figure Q1 , making an angle of 45° with the ground from both sides.
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 is the purpose of such an addition? What is the procedure called? Why is the procedure used in this experiment called liquid-liquid extraction?
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?
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.
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