. Enumerate the different types of hazards in the laboratory and give 1 example each. 2. In 3-5 sentences, explain the importance of wearing personal protective equipment.
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1. Enumerate the different types of hazards in the laboratory and give 1 example each.
2. In 3-5 sentences, explain the importance of wearing personal protective equipment.
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- 2. In case of an accident in the classroom, who should be notified immediately? 3. Why is it a safety procedure to tie back long hair in the laboratory? 4. Why should a student not eat or drink in the laboratory? 5. Why should any spills be reported and cleaned immediately? 6. Why should you wash your hands after every laboratory period? 7. Why is rough play in the laboratory dangerous? 8. When would the wearing of safety goggles be a proper procedure? 7_4. Preservatives that are usually found in cured meats, bacon, ham, corned beef and hot dogs. A. Benzoates C. Sorbates В. Nitrates D. Acids 5. A type of additive that stabilizes foods through moisture control. A. Emulsifiers C. Humectants B. Flavor Enhancer D. Antioxidants 6. Additives that are usually powders added to baking mixtures which react chemically to release carbon dioxide. A. Raising Agents B. Thickeners C. Humectants D. AntioxidantsIn a few lines, describe the IMMENENT IMPORTANCE of “Green Chemistry" and its importance to Society.
- Explain the importance of knowing laboratory safety rules, guidelines, and waste management.8.If the label tells you to apply 3 ounces of Pesto 60 SP per 1,000 sq. ft. then how much would be needed to treat 2.5 acres? How much active ingredient is being applied on a per acre basis?What is the importance of Chemical Safety in the laboratory?
- 2. Why is it important to know the use of laboratory tools and equipment?• Stock solution: 1000 mg/L Target sample concentrations: 50-400 mg/L • Create a 5-point standard dilution to cover the test • If each test only needs 10 mL, make plans to make the dilution so you have 20 mL of each concentration. ·6. Explain the reason why a laboratory analyst should not return excess or unused chemicals back in their respective reagent bottles.
- Chemistry Five modern United States pennies are measured three times each on a balance, and their measured masses are compared to the actual mass of a penny (2.5000 grams according to US Mint). a. When looking at the precision of the balance, which would be more ideal: one relative standard deviation value for fifteen measurements or five relative standard deviation values for the five pennies? 2. What is the relationship between solubility and density? Why is it important to consider the solubility of substances when determining their densities? 3. Why is it ideal to use only 10 mL or greater of a liquid when calculating for density? 4. Assume you have stacked 5 liquids on top of one another in a column. Each liquid (3 mL) has varying densities. What will happen to the densities of the liquids if the volume of each increased? 5. What does percent error indicate: quality of instrument (refer to the balance and penny example in Problem #1) or quality of penny? Why?Please help out with this lab safety question. Explain.What volume (in mL) of 0.0887 M MgF2 solution is needed to make 275.0 mL of 0.0224 M MgF2 solution? McVc=MdVd A.10.9 mL B.91.8 mL C.14.4 mL D.72.3 mL E.69.4 mL