Which of the following is considered chemical control? O a. None O b. Heat, alcohols, ethylene oxide and heavy metals O c. Radiation, filtration, heat and heavy metals O d. Alcohol, halogens, acids and dyes

Q: Discuss the approaches used to study the effects of toxic chemicals on organisms

A: Introduction  There are certain chemicals that are toxic to mankind like they can cause some adverse…

Q: disinfectants, antiseptics and antibiotics

A: Disinfectants are a type of  chemicals that destroy pathogens of causing of disease or other harmful…

Q: Heat-sensitive materials (rubber and plastic) and bulkymaterials (mattresses) can be sterilized…

A: The process of sterilization is defined as the steps taken to eliminate or deactivate various forms…

Q: 1.) During a laboratory activity, Chemical reactions from mixture of chemicals should be observed…

A: Beside using a personnel equipment like gloves, coat, eye glass etc., one should also be aware of…

Q: What happens to a worker if he/she is exposed to 500ppm CO for 3 hours? 10000 1000 deadly sickness…

A: In the given graph , relationship between the concentration of carbon monoxide and the number of…

Q: Define briefly the term radioactivity.

A: Radioactive atoms contain energy that pours out spontaneously as energetic subatomic particles or…

Q: Trivalent and pentavalent arsenic produce different effects on cells, yet there is little…

A: Arsenic is usually associated with arsenic poisoning. Despite its toxicity arsenic has been used…

Q: O The job of splitter in GC is taking part of the sample. O Column in GC should be placed in a…

A: Introduction Splitter as the name suggests splits the sample. It controls the amount of sample that…

Q: Which factor makes the biggest difference when studying the effects of radiation on an organism? O…

A: Introduction :- Radiation is energy that originates from a source and travels at the speed of light…

Q: in a solution, the solvent is:  A) always a gas  B) always water C) the substance that is…

A: A solution is a uniform and stable mixture of solute and solvent. Solute particles are invisible in…

Q: What does it mean to say that a substance is radioactive?

A: A substance composed two or more elements bonded together via chemical bonds is known as a compound.…

Q: The major characteristics of chemical control agents as a group include: (Select all that apply) O…

A: Major characteristics of chemical control agents.

Q: µc of a radioactive material 100 injected in a patient. If its physical half life time is 4 days and…

A: Introduction  half-life, in radioactivity, the interval of time required for one-half of the atomic…

Q: What is the function of the flame in AAS? O lonozation of sample O Atomization of sample O boling of…

A: Guystav Kirchoff and Robert Bunsen first used atomic absorption spectroscopy in 1859 for identifying…

Q: 2. All of the following belong under physical stressors, EXCEPT: A. Noise B. Radiation C. Reagents…

A: Stress is defined as the type of change which results in physical, emotional, behavioural or…

Q: I. Define the following medication storage temperatures: a. Room tempreature   b. Refrigerator…

A: The chemical ingredients or componets are subjected to change or may undergo degradation when…

Q: One reason given by Peruvian officials for not chlorinating their water supply is that chlorine can…

A: Chlorination of water is one of the widely accepted methods used worldwide to eliminate the possible…

Q: If glass is so dangerous, why is it used in the lab?

A: Most injuries in a laboratory caused by the broken glass. This kind of injuries should be avoided in…

Q: efine and identify specific Wells G&H case examples of the following: Chemical(s) of Concern…

A: The wells G& H site of 330 acre is located in Woburn in  Massachusetts. This site has two…

Q: Which of the following is an invasive procedure in antiaging treatment.... A. use of sunscreen B.…

A: As a person ages, there are many changes occur in the body. The immune system weakens, increasing…

Q: c) Humans can be exposed to chemical hazards in many ways. i. List three (3) methods on how…

A: A chemical hazard is a substance which has the ability to harm a living person due to its…

Q: Which statement among A-D is false regarding physical and chemical agents of control? A) O Effective…

A: Sterilization and pasteurization are equivalent processes because both are used to kill…

Q: A student wants to determine how different factors affect the rate of dissolving a solid in water.…

A: Dissolution is defined as the process in which solid is completely dissolved in water.

Q: Which of the following is not a deprotonated substance: a) KOH b) LiOH c) HA d) B

A: Protonation is the addition of proton and deprotonation means the removal of the proton.

Q: Which of the following methods should NOT be used to thaw frozen meats? a) refrigerator thawing b)…

A: Thawing is the process of taking a frozen product from frozen to a temperature (usually above 0°C)…

Q: Which of these substances are considered hazardous waste? A. Corrosive materials B. Flammable…

A: Introduction Hazardous waste is defined as waste that comprises organic or inorganic components or…

Q: HW HW1: List and define the types of radiation used in health physics instruments. HW2: Choose one…

A: There are four forms of radiation that are commonly encountered: alpha radiation, beta radiation,…

Q: Do you think rules and guidelines on laboratory safety and chemical handling are designed to hinder…

A: Laboratory handling and chemical handling is important for saving our life. Laboratory handling…

Q: Mobile phase can be :  A) Solid or liquid B) Only solid C) Only gas D) Liquid or gas

A: Chromatography is a technique that is used to separate different components of a mixture as a result…

Q: .C The liquid-in-glass thermometers

A:

Q: Electrostatic precipitators or wet scrubbers can be used to reduce pollution. O particulate matter…

A: Pollution caused by industrial activities and combustion is of great concern Various abatement…

Q: Explain why you agree or disagree with each of the following statements: a. We should not worry much…

A: The toxicity of a substance is its ability to cause harmful effects. These effects can strike a…

Q: Hot air at 50 C does not cause a lethal burn on our skin, but water with the same temperature is…

A: yes its true that Hot air even at 50C can not burn our skin, but water with same temperature can…

Q: Why does PET use different isotopes than that of nuclear medicine exams with gamma cameras? What…

A: Nuclear medicine is a branch of medicine that deals with the use of radioactive substances in…

Q: Food is often irradiated with either x rays or electron beams to help prevent spoilage. A low dose…

A: The equivalent and absorbed dose are equal for the x-rays RBE=1 a) To find the dose, 175 k rad=175 k…

Q: Write shortly about the instrumentation of ATR spectroscopy.

A: The tool of spectroscopy is used to study the structures of atoms and molecules. The large number of…

Q: Define the terms below i. Radioisotope ii. Decay series iii. Radioactive decay energy and its units…

A: 1. Radioisotope: It is an unstable form of a chemical element that releases radiation as it breaks…

Q: In relation to the Doses and Sources of Radiation, give examples of the Radioactive sources…

A: Here we have to give examples of radioactive sources in medicine for therapy.

Q: The primary concern with using bleached paper products for food is: lead dioxin O methylmercury O…

A: The bleached paper appears white because it is bleached with chlorine in its processing at the end…

Q: 1. Describe the safety procedure(s) you would follow to solve each of the following laboratory…

A: In laboratory certain safety measures must be followed. Some of the instances are discussed in step…

Q: Give some measures while handling or working with any radioactive element.

A: Radioactive elements are unstable isotopes, which release subatomic particles or energy as they…

Q: The quality of essential oils has been tested using different methods including: (Select all that…

A: Chromatography is a laboratory method of separating the mixture into individual components. It…

Q: Data table Evidences of Chemical Observation Before the change Chemical System After the change…

A: Changes changes are those which are characterized by the formation of a new product or decomposition…

Q: Silvadene, a topical treatment for burns, contains 1% silver. What category of chemical…

A: option a is the correct answer . Silver sulfadiazine belongs to a class of drugs known as…

Q: Radioactive decay produces ionising radiation.  Like all ionising radiation this can lead to harmful…

A: The radiation is produced due to the decay of the radioactive particles, they release different…

Q: A chemist reported that carbon dioxide gas at −78 °C was kept in the laboratory. Which property of…

A: Gas is one of the forms of water. It has several properties such as expansion, easy to be…

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