CHM2023 USF Chemicals At Home & Nutrition Energy

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CHM 2023, Spring 2019 Department of Chemistry, University of South Florida Pre-Investigation 3: Chemicals in Your Home Required Reading: Sections 3.1 - 3.2 of your textbook Assignment: Every object in our surroundings is composed of chemicals. We are going to use common household objects to illustrate this point. Look for a personal hygiene product in your home and look up the list of ingredients of the product, which is usually printed on the back of the container. Examples of adequate products with a printed list of ingredients on the container: shampoo, conditioner, liquid soap, deodorant, mouthwash, toothpaste, lotion, etc. Using reference resources (the internet, Google, Wikipedia, the library), identify one ingredient that is a solid at room temperature and one ingredient that is a liquid at room temperature. Using water as an ingredient is not allowed. List all of the following information about each ingredient you choose: 1. Name 2. Chemical formula Note: Also called a molecular formula, a chemical formula is a symbolic representation of a chemical species which indicates the elements present in the species and the relative number of atoms of each element that is present. For example, the chemical formula of water is H2O, which means that each molecule of water has two atoms of hydrogen and one atom of oxygen. 3. Physical state at room temperature 4. Melting point (for the solid ingredient) and boiling point (for the liquid ingredient) 5. Is the ingredient flammable? (yes, no, or partially) 6. Is the ingredient irritant to eyes, skin, or respiratory tract? (yes, no, or partially) 7. The names of all the elements present in the ingredient (use the chemical formula and the periodic table of elements to guide you) 8. Product in which you found the ingredient (For example: anti-dandruff shampoo) Helpful hints: 1. The website is a very useful database of chemicals in which you can find most of the required information about the ingredients. 2. If for a given ingredient you can only find the melting point and not the boiling point, then that ingredient could be a solid at room temperature. If you can find a boiling point, then it could be a liquid at room temperature. As a reference, assume room temperature is 25°C or 72°F.
CHM 2023, Spring 2019 Department of Chemistry, University of South Florida Pre-Investigation 4: Nutrition and Energy Required Reading: Sections 3.4, 3.5, and 3.6 of your textbook Assignment Your nephew, Mark, recently went to a physician who notified him that he is 25.00 lb. overweight. Because of this, he has decided to lose some weight in order to get healthier. He went to see a dietitian who provided him with a diet he could follow to achieve this. For every day, the diet suggests specific meals he could eat for breakfast, lunch, and dinner. The following are the suggested meals for Day 1: Breakfast 1 banana, 1 cup of nonfat milk, 1 egg Lunch 1 cup of carrots, 3 oz of ground beef, 1 apple, 1 cup of nonfat milk Dinner 6 oz of skinless chicken*, 1 baked potato, 3 oz of broccoli, 1 cup of nonfat milk Questions: Using energy values from Table 3.9 of your textbook (page 90 in section 3.6), determine each of the following: 1. The total kilocalories for the suggested breakfast meal 2. The total kilocalories for the suggested lunch meal 3. The total kilocalories for the suggested dinner meal 4. The total kilocalories for Day 1 *Note that the value provided in Table 3.9 for skinless chicken corresponds to 3 oz, but the suggested dinner meal includes 6 oz of skinless chicken.

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