When synthesizing aspirin, 3.012 g of salicylic acid (138.12…

When synthesizing aspirin, 3.012 g of salicylic acid (138.121 g/mol) were used. 2.538 g of aspirin (180.158 g/mol) were recovered. Answer must be to correct significant figures and proper units.   Calculate the theoretical yield of aspirin. [answer1] Calculate the percent yield. [answer2] Calculate the percent error. [answer3]

A 38-year-old male presents with a three-month history of lo…

A 38-year-old male presents with a three-month history of low back pain and right leg pain that has failed to improve with non-operative modalities, including selective nerve root corticosteroid injections. Leg pain and paresthesias are localized to his buttock, lateral and posterior calf, and the dorsal aspect of his foot. On strength testing, he is graded a 4/5 for plantar-flexion and 4+/5 to ankle dorsiflexion. On flexion and extension radiographs there is no evidence of spondylolisthesis. Sagittal and axial T2-weighted MRI images reveal a large L5/S1 disc herniation. Which of the following treatment modalities will allow the greatest improvement of physical functioning?

A 32-year-old right hand dominant female presents to your cl…

A 32-year-old right hand dominant female presents to your clinic with a 3-month complaint of right-hand pain and paresthesia of the thumb, index, and middle fingers. She works in a retail sales office where she spends much of the day on the computer keyboard typing. The presence of which of the following findings on physical examination would suggest that the underlying condition was more advanced?