Question

a eudiometer is a laboratory device that measures ______. the change in volume of a gas mixture following a physical or chemical change the pressure of the air in the atomosphere the temperature of a gas in solution the amount of gas in a fixed container

Explanation:

An eudiometer is a device used to measure the change in volume of a gas mixture during a physical or chemical change (like gas evolution or consumption in reactions). The other options: measuring atmospheric pressure is done by a barometer, temperature of gas in solution isn't what an eudiometer does, and it doesn't measure the amount of gas in a fixed container.

Answer:

the change in volume of a gas mixture following a physical or chemical change