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A student placed 12.5 g of glucose in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the 100. mL mark on the neck of the flask was reached. The flask was then shaken until the solution was uniform. A 55.0 mL sample of this glucose solution was diluted to 0.500 L. How many grams of glucose are in 100. mL of the final solution?
Iridium-192 has a half-life of 74 days. What fraction of a sample of this isotope will remain after 222 days
An experiment produces 15.0 grams of hydrogen for every 71.0 grams of oxygen used. How many grams of oxygen will you need to produce 6.0 g of hydrogen
Calculate the deltaG in kJ for this reaction at 37 oC to the nearest tenth of kJ. Only include the numerical part of your answer, do not include units
A 25.0-mL sample of 1.00 M NH3 is titrated with 0.10 M HCl. What is the pH of the NH3 before the titration begins? Kb = 1.8 × 10-5
A gas vessel is attached to an open-ended manometer filled with a nonvolatile liquid of a density 0.993 g/mL. the difference in height of the two liquids is 32.2 cm @ 765 mmHg. Given the density of Hg is 13.6 g/mL, what is the pressure of the encl..
Ascorbic acid is a diprotic acid Ka1=8.0*10^-5 and Ka2= 1.6*10^-12. What is the pH of a .260 M solution of ascorbic acid
Benzoic acid, 1.25g , is reacted with oxygen in a constant volume calorimeter to form H2O(l) and CO2(g) at 298 K. The mass of the water in the inner bath is 1.40×103g . The temperature of the calorimeter and its contents rises 2.83K as a result of..
Mixtures of helium and oxygen are used in scuba diving tanks to help prevent the bends, which is a condition caused by nitrogen bubbles forming in the bloodstream.
How much KOH (in grams) is required to neutralize a sample of 125mL of 0.5N HCl that has just been added to 875mL of distilled water
Major consulting firms such as Accenture, Ernst & Young Consulting, and Deloitte & Touche Consulting employ statistical analysis
What is the density of a block which mass is 50.0 g and is only submerged 40% in bromoform which has a density of 2.890 g/cm^3
Which type of amino acid replacements is a non-phosphorylatable or a phospho-mimetic? - One of these is considered a non-phosphorylatable mutation and the other is a phospho-mimetic mutation.
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