________ is commonly used as an internal reference in NMR spectroscopy; its signal is assigned 
in 1H and 13C NMR spectroscopy.
Definitions:
Acute Illness
A disease or condition that comes on quickly and can be severe, but is usually short-lived.
Health Care Spending
Financial expenditures related to maintaining, restoring, or enhancing an individual's health.
Physician
A qualified individual who practices medicine, diagnosing and treating diseases, injuries, and other physical and mental impairments.
Hospital
A healthcare institution providing patient treatment with specialized medical and nursing staff and medical equipment.
Q21: Provide the major organic product of the
Q27: Which of the following are considered to
Q29: What is the major product of the
Q49: Explain how hydrogen bonding affects the shape
Q65: What reagent(s)would you use to accomplish the
Q77: Which of the following reagents will quantitatively
Q84: Which of the following compounds is g-butyrolactone?
Q110: What alkyl bromide should be used in
Q116: A compound shows a molecular ion peak
Q117: Provide the structure of benzenesulfonic acid.