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Category: Chemistry
Write the formulas of compounds in which the combining ratios are as follows: (a) Sodium: chlorine: oxygen, 1:1:3 (b) Aluminum (atomic symbol Al): fluorine (atomic symbol F), 1:3
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Category: Chemistry
Looking Ahead Many substances that are involved in chemical reactions in the human body (and in all organisms) contain carbon, hydrogen, oxygen, and nitrogen arranged in specific patterns. Would you expect new medications to have features in common with these substances, or would you expect them to be drastically different? What are the reasons for...
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Category: Chemistry
Looking Ahead You have a sample of material used in folk medicine. Suggest the approach you would use to determine whether this material contains an effective substance for treating disease. If you do find a new and effective substance, can you think of a way to determine the amount present in your sample? (Pharmaceutical companies have used this a...
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Category: Chemistry
Trying It Together You have samples of urea (a solid at room temperature) and pure ethanol (a liquid at room temperature). Which technique or techniques would you use to measure the amount of each substance?
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Category: Chemistry
In a newspaper, you read that Dr. X claimed that he has found a new remedy to cure diabetes. The remedy is an extract of carrots. How would you classify this claim: (a) fact, (b) theory, (c) hypothesis, or (d) hoax? Explain your choice of answer.