The release of a gas from a chemical reaction is very quick. A scientist wants to measure what is released, but in small increments. What would allow the scientist to change the rate of the reaction so the results could be measured?

An inhibitor slows a chemical reaction, allowing the gas to be released more gradually and measured in small increments. An enzyme can speed up certain reactions, and an accelerator increases reaction rate, so neither helps slow the release. A depressant is not the standard term for a chemical that slows a reaction.

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