In polymerizing polystyrene from styrene monomers, the monomer is dissolved in about 80 percent ____.?
A. ?water
B. ?formaldehyde
C. ?benzene
D. ?acetaldehyde
Answer: C
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Fill in the blank(s) with the appropriate word(s).
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What percentage of nursing homes use animals in some way?
A) About 50 percent B) Just over 90 percent C) Nearly 10 percent D) Under 30 percent
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What will be an ideal response?
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If proximity detectors are used in areas that contain metal shavings or dust, an effort should be made to do what?
What will be an ideal response?
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