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Question 1 of 51
1. Question
When a liquid evaporates, what is happening at the molecular level?
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Question 2 of 51
2. Question
What is the percentage of the gas or vapor concentration in air that will burn or explode if ignited?
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Question 3 of 51
3. Question
At concentrations above the upper flammable limit (UFL), or upper explosive limit (UEL), a vapor or gas is too _____ to burn.
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Question 4 of 51
4. Question
The point at which a fuel spontaneously ignites, even without ignition from an independent source is called the:
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Question 5 of 51
5. Question
Atmospheric _____ can control different variables such as the boiling point of a substance.
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Question 6 of 51
6. Question
What is one way to reduce the vapor pressure of a container?
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Question 7 of 51
7. Question
What happens when a material reaches a critical point?
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Question 8 of 51
8. Question
Critical pressure is the pressure necessary to ____a gas at its critical temperature.
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Question 9 of 51
9. Question
Which refers to the temperature above which the decomposition of an unstable substance continues unimpeded, regardless of the ambient or external temperature?
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Question 10 of 51
10. Question
How is a substance’s self-accelerating decomposition temperature (SADT) related to its maximum safe storage temperature (MSST)?
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Question 11 of 51
11. Question
In order for a solid to change state into a liquid, it must reach its:
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Question 12 of 51
12. Question
In order for a liquid to solidify or crystallize, it must reach its:
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Question 13 of 51
13. Question
What is it called when the vapor pressure of a liquid is equal to the atmospheric pressure around the liquid, and vapor bubbles are forming within the liquid?
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Question 14 of 51
14. Question
What do you call the minimum temperature to which a substance must be heated to produce enough vapor to support sustained combustion?
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Question 15 of 51
15. Question
If the temperature of a boiling liquid drops below its boiling point, and the vapors begin to condense back into a liquid, this is called:
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Question 16 of 51
16. Question
What is the term for materials that readily change into a gas?
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Question 17 of 51
17. Question
When a material changes its state from a solid directly to a vapor without passing through a liquid phase, it has
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Question 18 of 51
18. Question
Hydrocarbons and derivatives with _____ molecular weight tend to be gases or nonviscous liquids.
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Question 19 of 51
19. Question
What types of elements or materials repel water?
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Question 20 of 51
20. Question
In what type of mixture are all the ingredients completely dissolved?
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Question 21 of 51
21. Question
If you add a solid to water and the solid does not completely dissolve, you get a(an):
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Question 22 of 51
22. Question
What does the concentration of a mixture tell you?
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Question 23 of 51
23. Question
Two materials that will not mix or dissolve into one another, such as oil and water, are called:
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Question 24 of 51
24. Question
Generally, heat _____ solubility for solids dissolved in liquids, and _____ the solubility of gases in solution.
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Question 25 of 51
25. Question
For a material to be considered soluble in product research materials, how much of the material must dissolve?
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Question 26 of 51
26. Question
Highly polar materials such as methanol and ethanol dissolve easily in water because water:
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Question 27 of 51
27. Question
What physical property specifically compares the ratio of the density of a substance to the density of water?
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Question 28 of 51
28. Question
A material’s state of matter may change if the _____ changes. (28) [11.2.1]
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Question 29 of 51
29. Question
A _____ has a specific mass and volume and will take on a specific shape.
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Question 30 of 51
30. Question
Which state of matter has a specific mass and volume but does not have a definitive shape?
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Question 31 of 51
31. Question
Hazardous materials in _____ form are typically the most challenging to control.
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Question 32 of 51
32. Question
A gas is a substance that will:
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Question 33 of 51
33. Question
Atmosphere (atm), bar, and torr are measuring units of:
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Question 34 of 51
34. Question
Non-liquefied compressed gases cannot be liquefied:
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Question 35 of 51
35. Question
A gas cannot be liquefied by pressure alone if it is
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Question 36 of 51
36. Question
Liquefied compressed gases and cryogenic liquids both have large vapor expansion rates which means that they will:
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Question 37 of 51
37. Question
What is a hazard of released cryogenic liquids, liquefied gases, and compressed gases?
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Question 38 of 51
38. Question
If a gas reaches the minimum temperature above which it cannot be liquefied no matter how much pressure is applied, then it has reached its:
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Question 39 of 51
39. Question
How does the density of a substance usually change with temperature?
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Question 40 of 51
40. Question
Which state of matter is usually the most mobile?
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Question 41 of 51
41. Question
Specific gravity will vary depending on the _____ of the material.
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Question 42 of 51
42. Question
If a material has a vapor density greater than 1, then that material will _____ in air.
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Question 43 of 51
43. Question
Divide the molecular weight (MW) of the material by the average molecular weight of air (29) to estimate a material’s:
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Question 44 of 51
44. Question
Most materials are _____ than air.
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Question 45 of 51
45. Question
The ease with which a material will flow is called its:
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Question 46 of 51
46. Question
The _____ of a chemical is its ability to remain in the environment when unconfined.
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Question 47 of 51
47. Question
A chemical’s _____ _____ is the lowest concentration at which most people can smell it.
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Question 48 of 51
48. Question
If the appearance of a material is significantly different than the description on the Safety Data Sheet (SDS), consider that the product:
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Question 49 of 51
49. Question
A material in its solid state may still easily travel long distances in the air if it is:
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Question 50 of 51
50. Question
What do you call the average kinetic energy of a substance’s particles?
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Question 51 of 51
51. Question
At its _____ point, a material’s vapors will flash in the presence of an ignition source but will not continue to burn.
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