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A 2.20 g sample of a large boimolecule was dissolved in 13.0 g of carbon tetrachloride. The boiling point of this solution was determined to be 77.85°C. Calculate the molar mass of the biomolecule. For carbon tetrachloride, the boiling point constant is 5.03°C·kg/mol, and the boiling point of pure carbon tetrachloride is 76.50°C.
A solution has an H3O1+ concentration of 1.7 10-2 M. What is the hydroxide ion concentration?
Please review the occurrence and cycling of calcium in nature, along with its use. Analyze and evaluate the article as to it's contemporary relevance regarding the elements availability, health implications and environmental impact.
Standardization of Na2S2O3, Added 0.12 g KIO3 and dissolved in 75 mL of distilled water. Added .20 g of KI to solution, then added 10 mL of 1M HCl and immediately titrated with thiosulfate solution (made by weighed 25 g of Na2S2O3-5H20
How many moles of magnesium and moles of chlorine ions are present in 123.4 mL of a .345 M solution of magnesium chloride
A 5.0 mL sample of vinegar was titrated with 7.2 mL of 0.55 M NaOH(aq). If the density of the vinegar solution is 1.00 g/mL, what is the mass percent of acetic acid present?
Methyl Orange is an acid-base indicator. In dilute solution, at pH greater than 4.4, it is yellow. At pH=3.2 the solution appears red. Draw a structure of the species that is formed at the lower pH of the acid proton adds to the azo nitrogen atom ..
You will need two series of standard solutions to calibrate your ion-selective electrodes - one series for sodium and one for calcium.
If 0.327 moles of H2S effuses in 462 seconds, how many seconds would it take for the same number of moles of CH3Cl to effuse?
A sugar-water mixture contains 45.8 g of sugar and 108.5 g of water. What is the percent by mass of sugar and the percent by mass of water in the solution?
Two objects at different temperatures are placed in a perfectly insulated calorimeter. When the system reaches equilibrium, which of the following statements is true?
A student is concentrating a solution having a polypeptide of modest molecular weight by pressure filtration through a membrane. The solute concentration on the feed side of the membrane is 0.10 M and the temperature is twenty five degree celsius.
A 100.0 g copper sample (specific heat = 0.385 J/goC) at 100.0oC is added to 50.0 g water at 26.5oC. What is the final temperature of the copper-water mixture?
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