Eye protection (e.g. goggles) is only necessary when working with open flames or highly corrosive chemicals. When designing a new experimental laboratory procedure safety should always be the first consideration.
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- 1. Which of the following is not a step in preparing a water sample container?a. All sample containers must be dark in colorb. The type of sample container and the level of cleaning required depend on the type of sample to be takenc. All sample containers must be thoroughly cleaned in the laboratory before sampling is carried outd. The number of containers prepared must always be in excess of what is needed, for quality assurance, quality control and reserves 2. The purpose of environmental sample analysis is..a. To determine the origin and concentration of chemicals in the environmentb. To determine the origin, concentration of chemicals and/or pollutants in the environmentc. To determine the concentration of a chemical in the environmentd. To determine the cause and concentration of pollutants in the environment2. 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? 7doug began preparing laboratory surface disinfectant from chlorine bleach. he put on a chemical resistant apron and gloves and then removed the bleach container from the special chemical cabinet. he carefully placed the container on the laboratory benchtop and began to add the chlorine bleach to distilled water. nearby workers began complaining of burning eyes. doug was reprimanded by the supervisor. Explain why.
- PART 3- LABORATORY EQUIPMENT EQUIPMENT NAME FUNCTION To hold test tubes. Attaches to a retort stand to support glassware being heated. To pour liquid from a large container into a small container. To provide a flame during an experiment. ones To light the Bunsen burner. To attach test tubes to a retort stand. To clean substances out of a test tube. To hold a hot crucible or flask. To hold a hot test tube. To place on the lab bench to prevent burning or to use with ring clamp. To transfer small amounts of liquid. To grow bacteria or contain small experiments. To hold liquids. To measure liquids. To contain experiments (a stopper can be used to close the flask). To hold a hot beaker. To perform an experiment with a different substance in each well. To hold chemicals and perform experiments in. To scoop and transfer small amounts of substances, To stir during experiments that involve mixing or dissolving.eaching and l X /ilrn/takeAssignment/take MindTap - Cengage Learning Submit Answer 200 X CovalentActivity.do?locator-assignment-take In the following 2-D illustrations, if there is a larger box it indicates a larger volume for the container holding the gas molecules. [Review Topics] [References] Use the References to access important values if needed for this question. A4 If both gas samples are at the same temperature, O the sample in box A has the highest pressure. O the sample in box B has the highest pressure. O it is not possible to say anything about the relative pressures. O both samples have the same pressure. A 30 molecules Retry Entire Group 7 more group attempts remaining Cengage Learning | Cengage Technical Support MacBook Air ad B 10 molecules DII J Previous Next> Save andWhat are the answers to these questions?
- Consider four distinct physical properties: boiling point, melting point, solubility, and density. which of these physical properties do you think allows extraction to work? and why?You will write an informal procedure in your lab notebook, and after lab, write a written procedure for the Post-lab. Match the following with the type of procedure. Hint: Refer to the 'Guide for Success in the General Chemistry Laboratory' in the front matter of your lab manual for further information regarding the differences between these two types of procedures. Contains as much detail as possible (i.e. type of glassware, concentrations) Contains only enough detail to concisely convey to the reader what occurred. Written step-by-step Written in paragraph form Written in past passive voice ✓ [Choose ] Informal procedure Written procedure [Choose] [Choose] [Choose ] [Choose ]Which statement is correct?
- 16. PBrs 17. IF. 18. BrF3STANDARD SAMPLE PREPARATIONS FOR ABSORBANCE & CONCENTRATION DATA Concentration of stock nickel sulfate hexahydrate solution = .400 Molarity Sample Volume Absorbance Concentration (In Molarity) a 5 mL .179 10 mL .329 15 mL .588 20 mL .760 25 mL .939 Reference Blank = 0 Please show how to find Molarity, please show steps. Thank you and stay safe.which statement best explains why evidence provided in the text is fallacy
