C48 - HW2 Study Guide 2 Chemistry:Electricity

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Santa Monica College *

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Chemistry

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Jun 2, 2024

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Name: ______________________ Class: _________________ Date: _________ ID: A 1 Esthetician SG 2- Chemistry/Electricity Multiple Choice Identify the choice that best completes the statement or answers the question. ____ 1. Why should beauty professionals study and have a thorough understanding of chemistry? a. Because every product used in beauty and wellness contains some type of chemical. b. Because it is unrelated to the safe operation of a salon, spa, or barbershop. c. Because clients often quiz beauty professionals on this important knowledge. d. Because chemistry experiments are often regular practice at salons, spas, and barbershop.. ____ 2. The effects of cosmetics and beauty products are based on which of the following? a. How the body reacts to chemicals b. How friends and family members react to a new look c. How pleased the beauty professional is with the results d. How favorably the new styles compare with the old ____ 3. Which of the following is TRUE of creams, lotions, masks, and makeup? a. They never contain chemicals. b. They only contain chemicals if they are not made from natural sources such as plant extracts. c. They only contain chemicals if they come from ingredients manufactured in a laboratory. d. They contain chemicals whether they come from natural sources or from ingredients manufactured in a laboratory. ____ 4. Any substance that occupies space and has weight is ______. a. a chemical b. matter c. potentially dangerous d. a beauty product ____ 5. Everything you can touch and everything you can see is matter EXCEPT ______. a. liquids and gases b. chemicals and powders c. light and electricity d. living and once-living bodies ____ 6. Which of the following is the simplest form of chemical matter? a. a liquid b. a gas c. an element d. a chemical ____ 7. How many elements are known to science today? a. 118 b. 108 c. 81 d. 18 Cosm 48 (1610) 9-7-23 Janet Martinez Lopez *Answers are highlighted*

Name: ______________________ ID: A 2 ____ 8. Of all the elements known to science today, how many occur naturally on Earth? a. 18 b. 19 c. 89 d. 98 ____ 9. ______ are the basic units of matter. a. Electrons b. Neutrons c. Protons d. Atoms ____ 10. Which of the following is an example of a compound molecule? a. the oxygen we breathe b. the ozone layer c. common table salt d. pure nitrogen ____ 11. Which of the following is an example of a chemical change? a. ice melting to become water b. water evaporating into the air c. exposed metal rusting d. liquid nail polish hardening ____ 12. Which of the following is TRUE when salt is dissolved into water? a. Water is the solute and salt is the solvent. b. Salt is the solute and water is the solvent. c. Salt and water are both solutes. d. Salt and water are both solvents. ____ 13. Which of the following is TRUE of all liquids? a. They are miscible. b. They are immiscible. c. They are both miscible and immiscible. d. They are either miscible or immiscible. ____ 14. When immiscible liquids are combined, they form ______. a. solutions b. suspensions c. miscible liquids d. stable mixtures ____ 15. What is a solute? a. a stable physical mixture of two or more substances b. a substance that dissolves a solvent and makes a solution c. a substance that is dissolved in a solution d. a liquid not capable of being mixed to form a stable solution Janet Martinez Lopez

Name: ______________________ ID: A 3 ____ 16. What is a solvent? a. a stable physical mixture of two or more substances b. a substance that dissolves a solute and makes a solution c. a substance dissolved into a solution d. a liquid not capable of being mixed to form a stable solution ____ 17. Which of the following is TRUE of solutions? a. They are immiscible. b. They are surfactants. c. They are usually a solid color. d. They are stable mixtures. ____ 18. Which of the following were the first surfactants? a. motor oils b. cooking oils c. soaps d. nail polishes ____ 19. The overexposure principle is used to describe how overexposure determines ______. a. tolerance b. toxicity c. safety d. immunity ____ 20. pH is an abbreviation of ______. a. potential hydrogen b. probable H 2 O c. pure hydrochloric acid d. productively high ____ 21. Why is understanding pH important for the beauty and wellness professional? a. Because it is essential for passing all exams. b. Because employers require it. c. Because it affects the hair, skin, and nails. d. Because it is directly related to income potential. ____ 22. The pH scale is used to measure ______. a. acidity and alkalinity b. overexposure and underexposure c. levels of carbon dioxide d. levels of oxygen ____ 23. All acids owe their chemical reactivity to ______. a. oxygen b. the hydrogen ion c. overexposure d. alkalis Janet Martinez Lopez

Name: ______________________ ID: A 4 ____ 24. For which of the following purposes would acids most likely be used? a. to raise the pH of products b. to swell the hair c. to exfoliate the skin d. to soften calloused skin ____ 25. Acid–alkali neutralization reactions occur when an acid is mixed with an alkali in equal proportions, balancing the total pH and forming water (H 2 O) and ______. a. a salt b. nitrogen c. carbon dioxide d. a sulfur ____ 26. What does an oxidizing agent do? a. absorbs oxygen b. releases oxygen c. increases oxygen d. nullifies oxygen ____ 27. What does a reducing agent do? a. adds hydrogen to a chemical compound b. subtracts hydrogen from a chemical compound c. adds oxygen to a chemical compound d. subtracts nitrogen from a chemical compound ____ 28. What accompanies the rapid oxidation of a substance during combustion? a. the production of heat and light b. an endothermic reaction c. neutralization d. an ionization of the substance ____ 29. Which of the following is TRUE of products that are incompatible? a. No two should be stored next to each other. b. They can be safely mixed with proper precautions. c. They should never be used on clients. d. They are always considered dangerous. ____ 30. Why should ammonia never be mixed with bleach? a. It “discolors” more than lightens the hair. b. It dries out skin excessively. c. It creates a potentially deadly gas. d. They become unpredictable in their use. ____ 31. When mixing chemicals, one should ______. a. avoid rooms or areas that are well ventilated b. add the water to the chemical, not the other way around c. never use secondary containers, such as spray bottles d. use a measuring device, such as a measuring cup or spoon Janet Martinez Lopez

Name: ______________________ ID: A 5 ____ 32. Which of the following is TRUE today of the disposal of many of the chemicals used in salons, spas, and barbershops? a. There are no regulations in place anywhere across the United States. b. Most states and counties do not have regulations in place. c. Most states and counties have regulations in place. d. There are strict and universal regulations in place across the United States. ____ 33. Guidelines for properly storing chemicals include all EXCEPT which of the following? a. Never dispose of chemicals in their original containers. b. Never allow chemicals to sit out. c. Always lock up chemicals when not in use. d. Never haphazardly combine two chemicals. ____ 34. What did the Safety Data Sheet (SDS) replace? a. the Material Safety Data Sheet (MSDS) b. the Environmental Protection Agency (EPA) c. the National Institutes of Health (NIH) d. the Occupational Safety and Health Administration (OSHA) ____ 35. An SDS is formatted into ______ categories. a. 16 b. 12 c. 10 d. 8 ____ 36. How many accepted pictograms are included in all SDS? a. 3 b. 6 c. 9 d. 16 ____ 37. SDS are designed for: a. use in an emergency b. use only by new employees c. use only by managers d. everyday use ____ 38. In the uniform order of the SDS, which of the following comes immediately after the first category of “Identification”? a. Hazard Identification b. First-Aid Measures c. Toxicology Information d. Disposal Considerations ____ 39. Which of the following BEST describes a carcinogen? a. a substance that causes cancer b. a substance made of carbon c. a material capable of igniting or burning d. a material that is very easy to ignite Janet Martinez Lopez

Name: ______________________ ID: A 6 ____ 40. A ______ is capable of igniting and burning. a. combustible b. carcinogen c. mutagen d. chemical ____ 41. Abner is opening a beauty business. He knows that his course in chemistry will help him to run a better business because ______. a. it is well known that beauty pros are often part-time chemists b. his clients will demand a high intelligence in chemistry c. every product he uses in his establishment will contain some type of chemical d. chemical experimentation is essential in beauty services ____ 42. Darren has just opened his high-end business. When his first customer enters his establishment and asks if Darren’s retail products are chemical free, what should his response be? a. “Yes,” if he believes they are, indeed, chemical free. b. “Yes,” whether they are or not because the client is unlikely to know the difference. c. “No,” if they are not chemical free because honesty is always the best policy. d. “No,” because there is no such thing as a chemical-free product. ____ 43. Jonathan, a licensed professional with his own business, is driving to the store to buy two dozen large bags of ice. Much of the rehabilitative work he and his employees do for clients relies on ice, and because someone left the freezer door open all night, their entire stockpile of ice is now water. Which of the following happened to the ice when it melted? a. an immiscible reaction b. a chemical reaction c. a physical change d. a chemical change ____ 44. Marcus and Amanda are arguing over whether air is a pure substance. Marcus insists that it is, whereas Amanda is certain that it is not. Who is correct, and why? a. Marcus is correct because air contains nitrogen, a pure substance. b. Marcus is correct because there are no pieces of matter in air. c. Amanda is correct because air contains many substances, so it cannot be pure. d. Amanda is correct because air contains no substances at all. ____ 45. Chloe is making a scented mist to use on her clients following their services. Which of the following is TRUE of the drops of lavender extract she is mixing into the water? a. They are solvents. b. They are solutes. c. They are solutions. d. They are immiscible. ____ 46. Javier is attempting to create a soothing oil to use on his clients during services. The problem Javier is running into, however, is that when the mixture is left to sit for more than five minutes, its components separate. Which of the following is most likely TRUE of the components of Javier’s mixture? a. They are miscible. b. They are immiscible. c. They are solvents. d. They are solutes. Janet Martinez Lopez

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