A sample of caffeine (306.4 mg) was dissolved in 200 mL wate…

A sample of caffeine (306.4 mg) was dissolved in 200 mL water, and 2 mL of this solution was diluted to 100 mL with the same solvent. A further dilution was performed by diluting 10 mL of this solution to 50 mL, again with water. The absorbance of this solution at 273 nm was found to be 0.313 in a 1 cm cell. Calculate the percentage purity of the sample, given that the specific absorbance of caffeine at 273 nm in water is 515.  (5 marks)

Upon the routine examination and culture of a non-sterile or…

Upon the routine examination and culture of a non-sterile oral saline solution, the following contaminant was isolated.    You should now complete the following paragraph by selecting the correct answer from each dropdown.   The Gram stained bacterium shown in the image above is a [IDENTIFICATION] [IDENTIFICATION2]. This method of identification provides information on the cells [TYPE] and relies upon the staining of the bacterial [COMPONENT]. It can identify in a [LEVEL] manner. This level of identification [YES] for targeted antibiotic therapy to take place.