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Unused chemicals from an experiment should be
| a. |
Disposed of in the proper container as indicated by the instructor |
|
| b. |
Saved for next class |
|
| c. |
Returned to their original containers |
|
| d. |
Dumped in the sink |
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- Explain how can hazardous wastes produced from the experiments should be stored, handled, and disposed. Discussion must NOT be more than 3 sentences in each item. State your answers using your own words and understanding. a. Stored b. Handled c. DisposedIn relating the existing concepts about 'cigarette smoking' in Chemistry and Science-related RRL, what is/are that chemical(s) which is/are ALSO present in the 'product side' of a clean combustion chemical reaction equation? a. carbon monoxide and carbon dioxide b. carbon c. carbon dioxide and water d. nicotine and tar Choose only one answer. Clue: Letter d is not the answerI. Broken glassware can be disposed of into the general waste trash bin. II. General waste includes papers and plastic bottles. A. First statement is true and second statement is false B. First statement is false and second statement is true C. Both statements are incorrect D. Both statements are correct I. Halogenated waste should be separated from non-halogenated wastes II. These wastes are placed in a blohazard bag. A. First statement is true and second statement is false B. First statement is false and second statement is true C. Both statements are incorrect D. Both statements are correct
- 3. What are volatile chemicals? A. Chemicals that exist as gases at ambient conditions (room temperature and pressure) B. Chemicals that are very reactive. C. Chemicals that can evaporate easily at ambient conditions. D. Chemicals that are liquids at ambient conditions.In relating the existing concepts about 'cigarette smoking' in Chemistry and Science-related RRL, what is/are that chemical(s) which is/are ALSO present in the 'product side' of a clean combustion chemical reaction equation? a. carbon monoxide and carbon dioxide b. carbon c. carbon dioxide and water d. nicotine and tar *Choose only one answerLABORATORY SAFETY 1A. You are finished with the lab activity when: a. you have collected your data b. you have followed proper clean-up procedures c. the group next to you is done d. the bell rings 1B. If the fire alarm sounds during a lab activity, a. leave only if the fire is in the room where you are located b. leave the room as quickly and quietly as possible without doing anything to your lab station c. turn off all heat sources and follow the evacuation procedures d. carefully put away all your materials and exit 1C. If a piece of electrical equipment has a damaged wire, a. it is okay to use it is you don't touch the damaged part b. it should be fixed before use c. it should be given to your instructor right away d. it is okay to use it if sparks are not shooting from the wire Please answer within 30 minutes to 1 hour. Please try to answer all, if possible. Thank in advanced!!!
- 6. Explain the reason why a laboratory analyst should not return excess or unused chemicals back in their respective reagent bottles. 7. What do you mean by "aliquot" and "dilution"?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? 7INTRODUCTION TO THE b. you get a chemical particle into your eye- I. SUMMARY SAFETY QUESTIONS situations: 1. Describe the safety procedure(s) you would follow to solve each of the following laboratory a. your clothes catch on fire- First c. you cut or pierce yourself with a sharp object- d. you spill a chemical on your skin/clothing- LAB AND LABORATORY SAFETY 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? Lab Period 8. When would the wearing of safety goggles be a proper procedure?
- From a 10-mL sample, a 1-mL aliquot was taken and diluted to 100mL. From this, a 5-mL aliquot was taken and diluted to 20mL.The final 20mL was found to have a concentration of 0.004M analyte X.What is the concentration of analyte X in the 10-mL sample? a.16 M b.1.6 M c.0.016 M d.0.004 M e.0.001 M f.0.00001 M1. These are components of a sample that is of interest to the chemist, usually taken as a representative of a bigger sample.A. Aliquot portion B. Analyte C. Distillate D. Assay2. The Mercaptan content of household gas supplies is monitored continually to ensure that the gas has a sufficiently obnoxious odor to warn of dangerous leaks, what analytical method should be applied to ensure this feat? A. Gravimetric B.Spectroscopic C.Volumetric D. Electroanalytical 3. A branch of chemistry that deals on the analysis, techniques of instrumentation and data interpretation of experimental results.A. Physical Chemistry B. BiochemistryC. Analytical ChemistryD. Inorganic Chemistry4. It is a chemical classification that can be used for general procedures that require stringent quality specifications and a purity of ≥95%.A. Laboratory gradeB. ACS gradeC. Technical gradeD. Special purpose5.These are balances that have a maximum loading of 10 to 30 g with a precision of 60.01 mgA.…Please don't provide handwritten solution.... which of the following elements is essential to life because it is a component of proteins and nucleic acids? a. Phosphorus b. Sulfur c. Chlorine d. Bromine e. Nitrogen