A benzene molecule has the shape of a ____.   ?

A. ?straight chain
B. ?ring
C. ?kinked chain
D. ?crystal


Answer: B

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Los perfiles "Z", ángulos, y perfiles tipo sombrero son algunas de las diferentes formas de _____.

a. subviguetas b. canales c. hierros angulares d. apoyos

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____, such as those for pipe welding, are available for many different types of jobs. Such clamps make it possible to do faster and more accurate assembling.

A. Bar clamps B. Pipe clamps C. C-clamps D. Specialty clamps

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Compare nonreactive gases and exothermic gases.

What will be an ideal response?

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Cotter pins should be reused if they are not damaged

Indicate whether the statement is true or false

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