Questions from General Chemistry

Q: A 0.9826-g sample containing dimethyl phthalate, C6H4

A 0.9826-g sample containing dimethyl phthalate, C6H4COOCH3 219419g/mol, and unreactive species was refluxed with 50.00 mL of 0.1104 M NaOH to hydrolyze the ester groups (this process is calle...

Q: Neohetramine, C16H22ON428637g/mol,

Neohetramine, C16H22ON428637g/mol, is a common antihistamine. A 0.1247-g sample containing this compound was analyzed by the Kjeldahl method. The ammonia produced was collected in H3BO3 ; the res...

Q: The Merck Index indicates that 10 mg of guanidine, CHN53 ,

The Merck Index indicates that 10 mg of guanidine, CHN53 , may be administered for each kilogram of body mass in the treatment of myasthenia gravis. The nitrogen in a 4-tablet sample that had a total...

Q: A 0.917-g sample of canned tuna was analyzed

A 0.917-g sample of canned tuna was analyzed by the Kjeldahl method. A volume of 20.59 mL of 0.1249 M HCl was required to titrate the liberated ammonia. Calculate the percentage of nitrogen in the sam...

Q: A 0.7891-g sample of a mixture consisting solely

A 0.7891-g sample of a mixture consisting solely of sodium bromide and potassium bromide yields 1.2895 g of silver bromide. What are the percentages of the two salts in the sample?

Q: Calculate the mass in grams of protein in a 5.00

Calculate the mass in grams of protein in a 5.00-oz can of tuna in Problem 14-35.

Q: The data in the accompanying table represent the concentration of glucose in

The data in the accompanying table represent the concentration of glucose in the blood serum of an adult patient. On four consecutive days, a blood sample was drawn from the patient and analyzed in tr...

Q: A 0.5843-g sample of a plant food preparation

A 0.5843-g sample of a plant food preparation was analyzed for its N content by the Kjeldahl method, the liberated NH3 being collected in 50.00 mL of 0.1062 M HCl. The excess acid required an 11.89 mL...

Q: Calculate the p-functions for each ion in a solution that

Calculate the p-functions for each ion in a solution that is A. 0.0200 M in NaBr. b. 0.0300 M in BaBr2. c. 4.5 × 10-3 M in Ba(OH)2. d. 0.020 M in HCl and 0.010 M in NaCl. e. 7.2 × 10-3 M in CaCl2 and...

Q: A 0.8835-g sample of a wheat flour was

A 0.8835-g sample of a wheat flour was analyzed by the Kjeldahl procedure. The ammonia formed was distilled into 50.00 mL of 0.05078 M HCl; a 8.04-mL back-titration with 0.04829 M NaOH was required. C...