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Tech Escort - Chem
Chemical Block 2015
| Question | Answer |
|---|---|
| Vapor Pressure | The pressure (force) exerted by the vapor molecules in a closed container at equilibrium |
| Vapor Density | Dividing the molecular weight of vapor by the molecular weight of dry air |
| Ionization Potential | Amount of energy required to excite a valence electron. Compounds potential must be at or below the energy of the instrument. |
| Boiling Point | Temperature at which a substance's vapor pressure equals and then exceed the atmosphere. Liquid -> Gas |
| On the periodic table, the vertical column is know as the .... | Group |
| What are the three states of matter? | 1. Solid 2. Liquid 3. Gas |
| On the periodic table, the horizontal row is know as the .... | Period |
| Elements | Cannot be broken down into any simpler form and retain properties of that element |
| Compounds | 2 or more elements bound together chemically |
| Electrons are found... | On the outside orbitals |
| Neutrons are found... | On the inside of the nucleus |
| What are types of mixtures? | 1. homogeneous 2. heterogeneous |
| Homogeneous | Relatively uniform in composition |
| Heterogeneous | Mixture composition varies from position to position |
| Ionic Bonding | Atoms gain or lose electrons during reaction (metal + nonmetals) |
| Covalent Bonding | Atoms share electrons during reaction (nonmetals + nonmetals) |
| Protons are found... | on the inside of nucleus |
| T/F: From left to right the atomic # decreases | False, the atomic # INCREASES |
| T/F: From right to left the atomic mass increases | False, the atomic mass increases from LEFT to RIGHT |
| Orbital | three dimensional region around the nucleus where an electron can be found |
| What is the role of the Recon Team? | - identification - characterization - render safe procedures - securing material - establish sump at entrance to target site |
| What is the composition of the Recon Team? | 3 EOD personnel or 2 EOD and 1 Chemical Sample Team LDR |
| What is the composition of the Sample Team? | - Sample Team LDR - Dirty Person -Clean Person |
| How many peronnel should the Sample Team consists of ? | Recommended 3 personnel; min. of 2 |
| What are some of the roles of a Sample Team LDR? | Develop a plan, team assignments, Brief the team, Control access, Create a target area/site sketch, Take/review photos and videos of sampling site, Prioritize sampling locations, Designate set up location, Record data, Follow unit SOP |
| What is the role of the Clean Person? | - Responsible for sampling bag - Disseminates sampling tools to the dirty person as required - Receives samples from dirty person - Performs final packaging of samples |
| Simple distillation is used when... | BPs differ by at least 70 degree C |
| Fractional distillation is used when... | BPs nearly similar or differ by 25 degrees C; can not be separated by simple distillation |
| Reflex is used to.... | Supply heat to reactions over a long period of time |
| Separation is used to... | Separate the components of mixture into two immiscible solvent phases of different densities in a liquid to liquid extraction |
| Filtration is used to... | Separate liquids from solids |
| Extraction is used and required when... | The desired compound has a limited solubility in a solvent |
| What are the purposes of sampling | - Conducted after search and survey is complete - Samples of contamination are required - When the agent identified cannot be determined or confirmed - Biological agents are suspected - Proof of agent is needed |
| What is the composition of a sample team? | - Sample team leader - Dirty person - Clean person |
| When cooling a sample in an ice chest, what is used only as a last resort? | standard ice |
| Grab sample | a sample removed at a single point in time from one location |
| What are the types of sampling strategies? | - Random - Systematic - Judgmental (selective) |
| Random Sampling | Unmethodical sampling; disorganized sampling |
| Systematic Sampling | Objective strategy where samples are taken at predetermined intervals |
| Judgmental (selective) | a subjective strategy where sites are selected based in the assessment or determination of the sampling team |