Question 12 Identify the independent variable, dependent variable, and constants in
the following scenario.
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To determine its effect on the rate of reaction, the concentration of
the hydrochloric acid is changed from 0.5 M to 2 M in 0.5 M
increments. For each trial, the volume is kept the same as is the
temperature.
volume
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acid concentration
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수
temperature
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rate of reaction
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first one is the correct answer

it is the most commonly accepted one

substituting a hydrogen atom with a halogen in a hydrocarbon:

- the single bond remains single. a is wrong.

- the bond with hydrogen is as strong as with a halogen. c is wrong

- a hydrocarbon is saturated if there is no double bond. we do not know that so d is wrong.

- carbon will always have four valence electrons. e is wrong.

by elimination, the correct answer is b. the boiling point of the new compound increases.