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what purpose does sodium carbonate serve during the extraction of caffeine from tea leaves?
Use the initial volume of acetic acid, the volume of NaOH required to reach the equivalence point and the value of the molarity of NaOH that you obtained when you standardized this solution against KHP in the strong-acid/strong-base experiment to ..
how many grams of C6H12O6 must be added to 250g of water to lower the vapor pressure by 1.30mm Hg at 40C degrees? the vapor pressure of water at 40C degrees is 55.3mm Hg.
Enough of a monoprotic acid is dissolved in water to produce a 0.0104 M solution. The pH of the resulting solution is 2.46.
a gas sample in an open manometer system has a pressure of 530 mmHg . The mercury column has a height of 545 mm on the gas sample side and a height of 425 mm on the air pressure side. what is the value of the air pressure in mmHg?
74.0 mL of a 1.80 M solution is diluted to a volume of 268 mL. A 134-mL portion of that solution is diluted using 179 mL of water. What is the final concentration.
What is the volume of the gas at STP conditions? b.) What is the molar volume of the gas?
What is the minimum amount of 6.2M H2SO4 necessary to produce 25.7g of H2 (g) according to the following reaction?
If the catalyst pore size is small in comparison with the mean free path, collisions with the pore wall controls the process'. The diffusivity under this condition is called 'Knudsen diffusivity'
A piece of pure aluminum is placed in contact with a piece of pure copper. At what temperature should diffusion ooccur for the concentration of copper in aluminum to be 600 kg>m
An endothermic chemical reaction with ?E = +41 kJ/mol has an activation energy of +95 kJ/mol. What is the activation energy for the reverse reaction?
Why did the book suggest using a Hirsch funnel? What would be the benefit of using a Hirsch funnel?
How many grams of potassium chlorate decompose to potassium chloride and 510. mL of O2 at 128°C and 652 torr?
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