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Author Question: Which compound's mass spectrum shows peaks at M, M + 2, and M + 4 with abundances in a ratio of 1:2:1? (Read 49 times) |
Cocaine was isolated in 1860 and first used as a local anesthetic in 1884. Its first clinical use was by Sigmund Freud to wean a patient from morphine addiction. The fictional character Sherlock Holmes was supposed to be addicted to cocaine by injection.
There used to be a metric calendar, as well as metric clocks. The metric calendar, or "French Republican Calendar" divided the year into 12 months, but each month was divided into three 10-day weeks. Each day had 10 decimal hours. Each hour had 100 decimal minutes. Due to lack of popularity, the metric clocks and calendars were ended in 1795, three years after they had been first marketed.
Urine turns bright yellow if larger than normal amounts of certain substances are consumed; one of these substances is asparagus.
This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.