1.Explain the slogan about chemical safety " A spill, A slip, A hospital trip" 2.How do you apply 5s(sort, set in order, shine, standardize, sustain) to attain chemical safety at home and in school?. Enumerate
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- how important is chemistry in solving ecological problems?How do you apply 5s (sort, set in order, shine, sustain and standardized) of chemical safety specifically at HOME and SCHOOL? Enumerate.If a field was sprayed with 2.5 x 104 g DDT per acre, how many years would it be for the concentration to drop to 50.0 grams per acre? Assume 365.25 days per year. Rate = 3.465 x 10-4 days-¹[DDT] =[?] years t, years Enter
- Choose the correct option for each question below In case of chemical burns in the laboratory, you should not do one of the following: 1) Cover with dry, clean or sterile material. 2) Rinse the area with large quantities of water. 3) Apply burn ointments or sprays to affected areas. 4) Call emergency services if large areas of victim’s body are affected.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 answer. Clue: Letter d is not the answerYou work in a research organization that is looking for markers of various diseases that can be used as a diagnostic for the disease. It has been reported in the past that high levels of Cu are found in the sweat of people with cystic fibrosis. One of the research projects is focused on looking for high levels of Cu in samples that can be obtained non-invasively such as saliva, sweat, hair, nails, etc. The lab will analyze large samples for Cu. What instrument would you recommend purchasing to support this work, Atomic absorption spectrophotometer or an inductively coupled plasma atomic spectrophotometer? Explain the basis for your decision.
- How do we prevent contamination of chemicals? Answer in 10 sentences. Thank youFINAL Experiment 1- January 2021_-789644623 - Saved Layout Review View Table A friend of yours went panning for gold last weekend and found a nugget that appears to be gold. With your newfound scientific prowess, you set out to determine if it is really gold. Your tests show that the nugget has a mass of 7.6 g. Immersing the nugget in water raised the volume from 7.22 mL to 8.06 mL. The density of gold is 19.32 g/cm3. What will you tell your friend? acerPosttest Direction. Read the questions carefully. Write the letter of the correct answer. 1. Water exists in three states of matter and continuously moving through a cycle on Earth. At which stage in the water cycle does water transform from a gas to a liquid? a.evaporation c. precipitation b. condensation d. Sublimation 2. Carbon dioxide (CO2) forms when coal burns in the presence of oxygen. Which of the following is the BEST evidence that a chemical reaction occurs when the coal burns? a. Production of mechanical energy c. A new substance is produced b. Production of electricity d. Formation of precipitate 3.Which of these does NOT happen during a chemical change? a. New substances are formed with different chemical properties. b. Attractive force between atoms of molecule formed or break. c. The chemical properties of the substances before and after the reaction are the same d. Energy is always released or absorbed. 4. A granular substance is added to a liquid. Which of the…
- 6. If you started with 7.25 bsh, how many bgt is equal to this?B. Rates of reaction are typically measured as the change of concentration per unit time. Some typical units of concentration are: M, mM, pM, µM, nM. Some typical units of time are: years, days, hr, s, ms, ps, µs, and ns. For each reaction, suggest a reasonable unit of measure for the rate of reaction. a. The combustion of gasoline. b. The transformation of organic material into crude oil. Chemical change involved with memory in the human brain. с. d. The rusting of an iron nail. 9. Why would a scientist use nM/ps instead of M/s? - 112 -A student conducts an experiment of the combustion of ethane in the presence of oxygen. The graph below represents data collected in the lab. COMBUSTION OF ETHANE +ethane +02 - H20 120 100 80 60 40 20 10 15 20 -20 TIME Which line on the graph above would represent the limiting reactant and which line on the graph above would represent the excess reactant for the combustion of ethane? In your answer, cite specific evidence from the graph to support your determination. NUMBER OF MOLES