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Jack and his lab partner did an experiment on the results of heating different combinations of chemicals on a hot plate. He performed four trials, each combining two different chemicals. Jack recorded several observations from the experiment.


Which of his observations was a qualitative result?

A.

The chemicals combined in trial three had a volume of 200 mL before heating.

B.

The product of the fourth trial was a liquid with a volume of 150 mL.

C.

The product of the second trial was a solid with a mass of 50g.

D.

The chemicals combined in trial one turned blue when heated.

Sagot :

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