The Reaction 2A $\rarr$ Products Is Second Order with Respect ToA

question 68

Multiple Choice

The reaction 2A $\rarr$ products is second order with respect toA. If the concentration of A drops from 1.05 M to 0.815 M in a time of 15.0 min, what is the rate constant for this reaction (the same time units may be used)

• A) 1.23 x 10^-2 M^-1min^-1
• B) 1.43 x 10^-2 M^-1min^-1
• C) 1.63 x 10^-2 M^-1min^-1
• D) 1.83 x 10^-2 M^-1min^-1

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Definitions:

Weld Symbol

A set of standard symbols used on blueprints and drawings to specify the type of weld, its size, and other processing and finishing information.

Countersink

A conical-shaped recess around a hole often used to allow the flat head of a screw or bolt to sit flush with or below the surface of the material.

Plug Weld

A weld made in a circular hole in one member of a joint fusing it to the surface of another member.

Weld Symbol

A standardized symbol on technical drawings specifying the type, location, and details of welds required for joining pieces of metal.