Chemistry, 18.09.2019 03:30 mustachbrah

Terry heats two different masses of substance a to different temperatures, and measures the amounts of both carbon dioxide and water produced.
which statement is true about this experiment?
this experiment is uncontrolled because two different masses of substance a are used.
this experiment is well controlled because only the mass of substance a is varied.
this experiment is uncontrolled because two gaseous products are measured.
this experiment is well controlled because the masses of substance a and the products are varied.

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Terry heats two different masses of substance a to different temperatures, and measures the amounts...

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