Chemistry In Focus
7th Edition
ISBN: 9781337399692
Author: Tro, Nivaldo J.
Publisher: Cengage Learning,
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Textbook Question
Chapter 15, Problem 30E
How do sunscreens protect your skin from the Sun’s rays? What does SPF indicate?
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Explain Sunscreens ?
7. Statement 1: All food additives are carcinogenic.
Statement 2: Food additives must be avoided as much as possible.
A. True, False
B. True, True
C. False, False
D. False, True
8. How do thickeners improve a food product?
A. They prevent spoilage due to oxygenation
B. They increase the viscosity of a product
C. They preserve the flavor of a product
D. They keep food from drying out.
_9. It makes the food thicker by keeping oil and water mixed together.
A. Emulsifiers
C. Humectants
B. Flavor Enhancer
D. Antioxidants
How do solvents help physical sunscreens as opposed to chemical sunscreens in formulations?
Chapter 15 Solutions
Chemistry In Focus
Ch. 15 - Prob. 15.1YTCh. 15 - Prob. 1SCCh. 15 - Prob. 2SCCh. 15 - Prob. 3SCCh. 15 - Prob. 1ECh. 15 - Prob. 2ECh. 15 - Prob. 3ECh. 15 - Prob. 4ECh. 15 - Prob. 5ECh. 15 - Prob. 6E
Ch. 15 - Prob. 7ECh. 15 - Prob. 8ECh. 15 - Prob. 9ECh. 15 - Prob. 10ECh. 15 - Prob. 11ECh. 15 - Prob. 12ECh. 15 - Prob. 13ECh. 15 - Define eutrophication.Ch. 15 - Prob. 15ECh. 15 - Prob. 16ECh. 15 - Prob. 17ECh. 15 - Prob. 18ECh. 15 - Prob. 19ECh. 15 - What are the three types of interactions that...Ch. 15 - Prob. 21ECh. 15 - Prob. 22ECh. 15 - Prob. 23ECh. 15 - Prob. 24ECh. 15 - Prob. 25ECh. 15 - Prob. 26ECh. 15 - Prob. 27ECh. 15 - Prob. 28ECh. 15 - Prob. 29ECh. 15 - How do sunscreens protect your skin from the Suns...Ch. 15 - Prob. 31ECh. 15 - Prob. 32ECh. 15 - Prob. 33ECh. 15 - Prob. 34ECh. 15 - Prob. 35ECh. 15 - Prob. 36ECh. 15 - Prob. 37ECh. 15 - Prob. 38ECh. 15 - Prob. 39ECh. 15 - Prob. 40ECh. 15 - Prob. 41ECh. 15 - Prob. 42ECh. 15 - Prob. 43ECh. 15 - Prob. 44ECh. 15 - Prob. 45ECh. 15 - Prob. 46ECh. 15 - The salt bridges that hold hair protein (keratin)...Ch. 15 - Prob. 48ECh. 15 - The hydrochloric acid present in toilet bowl...Ch. 15 - Prob. 50ECh. 15 - Prob. 51ECh. 15 - Prob. 52ECh. 15 - Prob. 53ECh. 15 - Prob. 54ECh. 15 - Prob. 55ECh. 15 - Prob. 56ECh. 15 - Prob. 57ECh. 15 - Prob. 58ECh. 15 - Prob. 59ECh. 15 - Prob. 60ECh. 15 - Prob. 61ECh. 15 - Prob. 62ECh. 15 - Prob. 64ECh. 15 - Prob. 65E
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- Which of the following compounds might be an ingredient in a commercial sunscreen? Explain why or why not. а. b. CH30arrow_forwardWhich of the following is true about heavy metals and their environmental impact? a. Coffee and tea waste could be viable options to rid water of heavy metals. b. Based on the study shown in class, coffee is definitively the best option to rid heavy metals from water. c. Coffee, tea and caffeine all remove heavy metals from contaminated water through absorption. d. Copper is the most prevalent metal found in drinking water that can cause harm to the environment and humans. e. Copper and zinc concentrations in drinking water are significantly higher in areas with human activity.arrow_forwardChoose your answer on the words/terms written inside the box. Note: answers may repeat Preservatives Nitrites Food additives Chemical Preservatives Benzoic acid Sweeteners Sorbates salt Sodium nitrites Natural Preservatives Benzoates 1. Substance that improves the quality and safety of food. 2. Chemical that is added to food or beverages to prevent microbial growth or to avoid spoilage. 3. These act by killing bacteria and other microorganisms present in foods especially in acidic conditions. 4. Type of food preservatives that kills disease causing bacteria. _5. An antimicrobial agent preservative that inhibits the growth of molds, yeast and bacteria in food. _6. A traditional and natural preservative. 7. Two main types of preservatives. 8 9. Responsible for the pink color of hot dogs and hams 10. These preservatives are used in salad dressings and pickles. 11. Any substance added to food to increase the shelf value of food for storage. 12. Preservatives used in baked goods, canned…arrow_forward
- Directions: Read each question carefully. Choose the letter of the correct answer. 1. Who were the first people to believe that soap-like material can treat skin diseases? a. Babylons 2. Why did soap-making become widespread in the 18th century? a. It was known to treat skin diseases. b. It was used for laundering and washing with much less effort. c. It was known as a luxurious cleaning agent among wealthy people. d. It was used to advertise campaigns on personal hygiene and health. 3. Which of the following is NOT an ingredient in soap-making? b. Egyptian c. Greeks d. Romans c. natural raw material d. vegetable oils a. animal fats b. hydrocarbon from petroleum 4. Which of the following forms scum or film when used in hard water? a. detergent 5. What alkali can be added to make hard soap? a. Caustic potash 6. What is the use of the hydrophobic end of the chemical composition of soap and detergent? b. soap c. both a and b d. none of the choices b. soap c. Potassium hydroxide d. Soda…arrow_forwardWhat method did the Persian healer and alchemist, Avicenna, develop that led to the art of aromatherapy? Choose one answer. a. identification of essential oils b. tainting of essential oils c. blending of essential oils d. distillation of essential oilsarrow_forwardPlease answer the following question:arrow_forward
- Determine whether the statements are true or false and could you please leave a short explanation in order for me to understand? Thank you so much! 1. Vitamins are useful in the body in great amounts.2. Vitamins don't have a common sturcture3. There is one type of vitamin B.4. Vitamin D is usually found in citrus fruits.5. There are vitamins that can be produced by the skin with the aid of sunlight.6. Vitamin K can solve fertility problems.7. Some vitamins can be synthesized by the human body.8. Before taking multivitamins, consultation with a doctor is important.9. All vitamins are water-soluble.10. Too much vitamins may be toxic to the body.arrow_forwardQuestion 10 Which scenario describes the most effective method of managing electronic waste to pro- duce the least amount of degradation in the environment? A large conglomerate in the United States ships electronic waste to developing countries for disposal. B. A computer company incinerates the electronic waste produced from defective prod- ucts to reduce the cost of landfill disposal. C. A school district uses recycle bins earmarked for the disposal of all electronic waste pro- duced throughout the school year. D. A hospital uses sanitary landfills to discard electronic waste to reduce the cost of recy- cling electronics.arrow_forwardDo we need to re-apply physical sunscreen every 2 hours like chemical sunscreen? Should we use sunscreen on acne prone skin or not? Please deeply explain about this topic. Thank youarrow_forward
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