Lab_1_Safety_1

The Covid-19 pandemic has many experts commenting on the science associated with the virus - origins, vaccines, monoclonal antibodies, masks, social distancing.  It is important to consider what the experts say, but to also evaluate their statements.  We will start with the scientific method.  I want you to outline the scientific method from what you have been taught in previous classes.  You can list steps, parts, process, short descriptions, whatever.  If not taught in previous classes, then you will make your best guess about it.

The phrase "Benign by design" is often associated with green chemistry. In your own words, what does this phrase mean in relation to green chemistry?

Which of the following statements is not true?     No food or drink, including water, is allowed in laboratory     It is okay to taste a chemical     Read and re-read labels on containers of chemicals before opening them     Dispose the chemical waste to appropriate waste container

Histology stains that are used to create microscopic images originally came from the industry. clothing cosmetics healthcare automotive food

Four individuals are suspects in a car theft. A small amount of blood was left in the car, likely from when the thief forced the window. The blood sample was amplified and compared to samples from the suspects. Lanes I, II, III, and IV are the samples from the four individuals. The lane marked "evidence" is the sample from the car. I II III IV Evidence - Which suspects, if any, can be eliminated? II and III II and IV I and IV I, III, and IV I and III I, II, and III Incorrect

Chemicals usually have both physical and health hazard. Identify the following if it b hazard. Health Hazard Mutagen Physical Hazard Barbeque have this benzo (a] pyrene that can cause cancer Physical Hazard Fire Toxins Physical Hazard Chemical burn Physical Hazard Explosives Large amount of smoke being inhaled Physical Hazard Spill of caustic soda in your skin Physical Hazard Health Hazerd Dlog

For the reaction 2N2O5(g) ® 4NO2(g) + O2(g), the following data were collected.   t (minutes) [N2O5] (mol/L)   0 1.24 x 10–2   10 0.92 x 10–2   20 0.68 x10–2   30 0.50 x 10–2   40 0.37 x 10–2   50 0.28 ´ 10–2   70 0.15 ´ 10–2         The initial rate of production of NO2 for this reaction is approximately:   A) 6.4 x10–4 mol/L • min   B) 3.2 x10–4 mol/L • min   C) 1.24 x 10–2 mol/L • min   D) 1.6 x 10–4 mol/L • min   E) none of these

Read through each scenario. Under the scenario, write which lab safety rule is being broken and indicate the proper protocol for each. 1. Jane is participating in a lab in which she blows carbon dioxide into a beaker of chemicals. Some of the chemical bubbles up and gets in her eye. Her lab partners tell her to use the eye wash fountains to rinse her eye out; however, she does not know where the eyewash fountains are located. 2. Mike and Colleen had a lot of a chemical left from their investigation. They dumped the chemical in the sink and left the water running in the sink as they left class

A chemist working as a safety inspector finds an unmarked bottle in a lab cabinet. A note on the door of the cabinet says the cabinet is used to store bottles of carbon tetrachloride, diethylamine, methyl acetate, tetrahydrofuran, and acetone.   The chemist plans to try to identify the unknown liquid by measuring the density and comparing to known densities. First, from his collection of Material Safety Data Sheets (MSDS), the chemist finds the following information:

Based on a grade 11 chemistry student, answer the following question based on the provided information in the provided information: Do you think Mary died due to an overdose of medication? Use evidence from your calculations to support your reasoning. Mary's weight is 50 kg.

. Complete the following table. Time (minutes) 0 2 4 6 8 10 Concentration of crystal violet, [R] 7.02 x 10-6 5.42 x 10-6 4.22 x 10-6 3.25 x 10-6 2.41 x 10-6 1.84 x 10-6 In [R+] Prepare three graphs using the attached graph paper: i) plot [R] (y-axis) versus time, ii) plot In[R] versus time, and iii) plot 1/[R+] versus time. How do these three plots differ? Which is the most linear? 1/[R+]

What is the difference between single use, limited use and reusable chemical protective garments?

The study of detecting small quantities of substances in samples would most likely be performed by a chemist in the branch of chemistry known as ___ . organic chemistry biochemistry inorganic chemistry analytical chemistry physical chemistry

Each word should be moved from the answer bank toward the answer side.

A chemist working as a safety inspector finds an unmarked bottle in a lab cabinet. A note on the door of the cabinet says the cabinet is used to store bottles of carbon tetrachloride, diethylamine, pentane, acetone, and tetrahydrofuran. The chemist plans to try to identify the unknown liquid by measuring the density and comparing to known densities. First, from his collection of Material Safety Data Sheets (MSDS), the chemist finds the following information: liquid density - 3 1.6 g·cm carbon tetrachloride diethylamine - 3 0.71 g·cm pentane 3 0.63 g cm 3 0.79 g cm acetone tetrahydrofuran - 3 0.89 g cm Next, the chemist measures the volume of the unknown liquid as 1.427 L and the mass of the unknown liquid as 894. g. Calculate the density of the liquid. Round 3 your answer to 3 significant digits. |lg.cm Given the data above, is it possible to identify the liquid? yes no carbon tetrachloride diethylamine If it is possible to identify the liquid, do so. pentane acetone tetrahydrofuran