Toxic handlers

researchers working in a chemistry lab were examined anatomical structures of the brain using concentrated formaldehyde solutions. Once their studies concluded there remained 1.5 gallons of the substance and the researcher decided to pour this down the drain. In this case, they directly violet regulations put in place by which office?1. Office of research integrity 2. Institutional animal care and use committee3. Occupational safety and health administration 4. Institutional review board

Can you please answer question #8? Thank you

A1L TPN order is written for 400 mL 10% Dextrose, 300 mL 4.25% amino acids, and a total of 37 mL of additives. How much sterile water for injection should be added? a. 55 mL b. 137 mL c. 163 mL d. 263 mL

Based on the data in the table, summarize what was shown here, what did they do here? And was this lab successful or not?     Substance  Physical Appearance Odor Density (g/mL) Reacts with NaHCO3 1.      Benzaldehyde  Clear liquid or almost pale yellow It smelled like almonds  1.00 No, significant reaction 2.      MTBE Colorless  Fruity smell to it 1.236 -1.247  No chemical reaction occurred 3.      Urea White solid  A very strong order of ammonia  0.791 No reaction occurred   4.       Acetone Colorless Pungent odor like nail polish remover 1.335 No, did not react with sodium bicarbonate 5.      Glycerol Colorless N/O 1.044 No, it did not cause a reaction 6.      Citric Acid colorless then turns white with sodium bicarbonate added N/O 1.044 Yes, caused fizzy/bubbles to it.

2. Which of the following statements is FALSE regarding the log-kill hypothesis? a. It predicts the 100% eradication of cells after some period of time. b. It is an application of first-order kinetics. c. It predicts that cell counts decrease exponentially with repeated cycles of application. d. It applies to sterilization as well as other fields such as chemotherapy. e. Each cycle of application kills the same fraction (or %) of cells just prior to that cycle.

Which of the following are hazards in this lab? Choose all that apply. Group of answer choices NaOH HCl NH3 acetic acid deionized water

* What is pesticides * What is pesticides about and who/what does it affect? * How is pesticides relevant to chemistry? * What is pesticides effect on health? * Are there any mechanisms or pathways involved in pesticides * Are there any relevant studies related to pesticides? * Are there any future directions for research on pesticides?

Ammonia must be eliminated from wastewater before it can be reused, recycled, or discharged. Describe the three major steps that are used to convert harmful ammonia into a harmless derivative. Your answer must be specific and include any appropriate chemical formulas or names of chemical or biological reagents. Mention, when appropriate, the toxicity of any of the components or how their production can get in the way of efficiently eliminating ammonia from wastewater.

None

2) Which of the diet sodas have the lowest concentration of aspartame? Which standard best reflects this concentration?

What is the purpose of Safety Data Sheets? Why are these important when handling common food service chemicals? What information/components are generally included? How do Safety Data Sheets vary?

We started with 80mm of soil in the mason Jar.  In some cases, after seperation of the sand, silt and clay, the volume of the soil is greater than 80mm.  What could be the cause of this?

Carla is using a fertilizer that contains nitric acid. How is nitric acid classified? strong acid weak acid strong base weak base Save and Exit Next Mark this and return ContentViewers/AssessmentViewer/Activit.